diff --git a/.appveyor.yml b/.appveyor.yml
index 7d774d31..6a297d46 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -3,18 +3,14 @@ image: Visual Studio 2017
 
 environment:
   matrix:
-    - version: 1.12-rc
+    - version: 1.12
       variant: windowsservercore-ltsc2016
-    - version: 1.12-rc
+    - version: 1.12
       variant: nanoserver-sac2016
     - version: 1.11
       variant: windowsservercore-ltsc2016
     - version: 1.11
       variant: nanoserver-sac2016
-    - version: 1.10
-      variant: windowsservercore-ltsc2016
-    - version: 1.10
-      variant: nanoserver-sac2016
 
 install:
   - ps: |
diff --git a/.travis.yml b/.travis.yml
index 903a5e0d..30c80e04 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,13 +5,11 @@ matrix:
   include:
     - os: windows
       dist: 1803-containers
-      env: VERSION=1.12-rc VARIANT=windows/windowsservercore-1803
+      env: VERSION=1.12 VARIANT=windows/windowsservercore-1803
     - os: linux
-      env: VERSION=1.12-rc VARIANT=stretch
+      env: VERSION=1.12 VARIANT=stretch
     - os: linux
-      env: VERSION=1.12-rc VARIANT=alpine3.9
-    - os: linux
-      env: VERSION=1.12-rc VARIANT=alpine3.8
+      env: VERSION=1.12 VARIANT=alpine3.9
     - os: windows
       dist: 1803-containers
       env: VERSION=1.11 VARIANT=windows/windowsservercore-1803
@@ -21,15 +19,6 @@ matrix:
       env: VERSION=1.11 VARIANT=alpine3.9
     - os: linux
       env: VERSION=1.11 VARIANT=alpine3.8
-    - os: windows
-      dist: 1803-containers
-      env: VERSION=1.10 VARIANT=windows/windowsservercore-1803
-    - os: linux
-      env: VERSION=1.10 VARIANT=stretch
-    - os: linux
-      env: VERSION=1.10 VARIANT=alpine3.9
-    - os: linux
-      env: VERSION=1.10 VARIANT=alpine3.8
 
 install:
   - git clone https://github.com/docker-library/official-images.git ~/official-images
diff --git a/1.10/alpine3.8/Dockerfile b/1.10/alpine3.8/Dockerfile
deleted file mode 100644
index 3a45e579..00000000
--- a/1.10/alpine3.8/Dockerfile
+++ /dev/null
@@ -1,63 +0,0 @@
-FROM alpine:3.8
-
-RUN apk add --no-cache \
-		ca-certificates
-
-# set up nsswitch.conf for Go's "netgo" implementation
-# - https://github.com/golang/go/blob/go1.9.1/src/net/conf.go#L194-L275
-# - docker run --rm debian:stretch grep '^hosts:' /etc/nsswitch.conf
-RUN [ ! -e /etc/nsswitch.conf ] && echo 'hosts: files dns' > /etc/nsswitch.conf
-
-ENV GOLANG_VERSION 1.10.8
-
-RUN set -eux; \
-	apk add --no-cache --virtual .build-deps \
-		bash \
-		gcc \
-		musl-dev \
-		openssl \
-		go \
-	; \
-	export \
-# set GOROOT_BOOTSTRAP such that we can actually build Go
-		GOROOT_BOOTSTRAP="$(go env GOROOT)" \
-# ... and set "cross-building" related vars to the installed system's values so that we create a build targeting the proper arch
-# (for example, if our build host is GOARCH=amd64, but our build env/image is GOARCH=386, our build needs GOARCH=386)
-		GOOS="$(go env GOOS)" \
-		GOARCH="$(go env GOARCH)" \
-		GOHOSTOS="$(go env GOHOSTOS)" \
-		GOHOSTARCH="$(go env GOHOSTARCH)" \
-	; \
-# also explicitly set GO386 and GOARM if appropriate
-# https://github.com/docker-library/golang/issues/184
-	apkArch="$(apk --print-arch)"; \
-	case "$apkArch" in \
-		armhf) export GOARM='6' ;; \
-		x86) export GO386='387' ;; \
-	esac; \
-	\
-	wget -O go.tgz "https://golang.org/dl/go$GOLANG_VERSION.src.tar.gz"; \
-	echo '6faf74046b5e24c2c0b46e78571cca4d65e1b89819da1089e53ea57539c63491 *go.tgz' | sha256sum -c -; \
-	tar -C /usr/local -xzf go.tgz; \
-	rm go.tgz; \
-	\
-	cd /usr/local/go/src; \
-	./make.bash; \
-	\
-	rm -rf \
-# https://github.com/golang/go/blob/0b30cf534a03618162d3015c8705dd2231e34703/src/cmd/dist/buildtool.go#L121-L125
-		/usr/local/go/pkg/bootstrap \
-# https://golang.org/cl/82095
-# https://github.com/golang/build/blob/e3fe1605c30f6a3fd136b561569933312ede8782/cmd/release/releaselet.go#L56
-		/usr/local/go/pkg/obj \
-	; \
-	apk del .build-deps; \
-	\
-	export PATH="/usr/local/go/bin:$PATH"; \
-	go version
-
-ENV GOPATH /go
-ENV PATH $GOPATH/bin:/usr/local/go/bin:$PATH
-
-RUN mkdir -p "$GOPATH/src" "$GOPATH/bin" && chmod -R 777 "$GOPATH"
-WORKDIR $GOPATH
diff --git a/1.12-rc/alpine3.8/Dockerfile b/1.12-rc/alpine3.8/Dockerfile
deleted file mode 100644
index 1f408e65..00000000
--- a/1.12-rc/alpine3.8/Dockerfile
+++ /dev/null
@@ -1,63 +0,0 @@
-FROM alpine:3.8
-
-RUN apk add --no-cache \
-		ca-certificates
-
-# set up nsswitch.conf for Go's "netgo" implementation
-# - https://github.com/golang/go/blob/go1.9.1/src/net/conf.go#L194-L275
-# - docker run --rm debian:stretch grep '^hosts:' /etc/nsswitch.conf
-RUN [ ! -e /etc/nsswitch.conf ] && echo 'hosts: files dns' > /etc/nsswitch.conf
-
-ENV GOLANG_VERSION 1.12rc1
-
-RUN set -eux; \
-	apk add --no-cache --virtual .build-deps \
-		bash \
-		gcc \
-		musl-dev \
-		openssl \
-		go \
-	; \
-	export \
-# set GOROOT_BOOTSTRAP such that we can actually build Go
-		GOROOT_BOOTSTRAP="$(go env GOROOT)" \
-# ... and set "cross-building" related vars to the installed system's values so that we create a build targeting the proper arch
-# (for example, if our build host is GOARCH=amd64, but our build env/image is GOARCH=386, our build needs GOARCH=386)
-		GOOS="$(go env GOOS)" \
-		GOARCH="$(go env GOARCH)" \
-		GOHOSTOS="$(go env GOHOSTOS)" \
-		GOHOSTARCH="$(go env GOHOSTARCH)" \
-	; \
-# also explicitly set GO386 and GOARM if appropriate
-# https://github.com/docker-library/golang/issues/184
-	apkArch="$(apk --print-arch)"; \
-	case "$apkArch" in \
-		armhf) export GOARM='6' ;; \
-		x86) export GO386='387' ;; \
-	esac; \
-	\
-	wget -O go.tgz "https://golang.org/dl/go$GOLANG_VERSION.src.tar.gz"; \
-	echo 'ed1d4f8e8a33f0d4a59a2f642584c7c6375fce2f8a4edaece73309cf2c89b8ee *go.tgz' | sha256sum -c -; \
-	tar -C /usr/local -xzf go.tgz; \
-	rm go.tgz; \
-	\
-	cd /usr/local/go/src; \
-	./make.bash; \
-	\
-	rm -rf \
-# https://github.com/golang/go/blob/0b30cf534a03618162d3015c8705dd2231e34703/src/cmd/dist/buildtool.go#L121-L125
-		/usr/local/go/pkg/bootstrap \
-# https://golang.org/cl/82095
-# https://github.com/golang/build/blob/e3fe1605c30f6a3fd136b561569933312ede8782/cmd/release/releaselet.go#L56
-		/usr/local/go/pkg/obj \
-	; \
-	apk del .build-deps; \
-	\
-	export PATH="/usr/local/go/bin:$PATH"; \
-	go version
-
-ENV GOPATH /go
-ENV PATH $GOPATH/bin:/usr/local/go/bin:$PATH
-
-RUN mkdir -p "$GOPATH/src" "$GOPATH/bin" && chmod -R 777 "$GOPATH"
-WORKDIR $GOPATH
diff --git a/1.12-rc/alpine3.9/Dockerfile b/1.12-rc/alpine3.9/Dockerfile
deleted file mode 100644
index 4f1866c6..00000000
--- a/1.12-rc/alpine3.9/Dockerfile
+++ /dev/null
@@ -1,63 +0,0 @@
-FROM alpine:3.9
-
-RUN apk add --no-cache \
-		ca-certificates
-
-# set up nsswitch.conf for Go's "netgo" implementation
-# - https://github.com/golang/go/blob/go1.9.1/src/net/conf.go#L194-L275
-# - docker run --rm debian:stretch grep '^hosts:' /etc/nsswitch.conf
-RUN [ ! -e /etc/nsswitch.conf ] && echo 'hosts: files dns' > /etc/nsswitch.conf
-
-ENV GOLANG_VERSION 1.12rc1
-
-RUN set -eux; \
-	apk add --no-cache --virtual .build-deps \
-		bash \
-		gcc \
-		musl-dev \
-		openssl \
-		go \
-	; \
-	export \
-# set GOROOT_BOOTSTRAP such that we can actually build Go
-		GOROOT_BOOTSTRAP="$(go env GOROOT)" \
-# ... and set "cross-building" related vars to the installed system's values so that we create a build targeting the proper arch
-# (for example, if our build host is GOARCH=amd64, but our build env/image is GOARCH=386, our build needs GOARCH=386)
-		GOOS="$(go env GOOS)" \
-		GOARCH="$(go env GOARCH)" \
-		GOHOSTOS="$(go env GOHOSTOS)" \
-		GOHOSTARCH="$(go env GOHOSTARCH)" \
-	; \
-# also explicitly set GO386 and GOARM if appropriate
-# https://github.com/docker-library/golang/issues/184
-	apkArch="$(apk --print-arch)"; \
-	case "$apkArch" in \
-		armhf) export GOARM='6' ;; \
-		x86) export GO386='387' ;; \
-	esac; \
-	\
-	wget -O go.tgz "https://golang.org/dl/go$GOLANG_VERSION.src.tar.gz"; \
-	echo 'ed1d4f8e8a33f0d4a59a2f642584c7c6375fce2f8a4edaece73309cf2c89b8ee *go.tgz' | sha256sum -c -; \
-	tar -C /usr/local -xzf go.tgz; \
-	rm go.tgz; \
-	\
-	cd /usr/local/go/src; \
-	./make.bash; \
-	\
-	rm -rf \
-# https://github.com/golang/go/blob/0b30cf534a03618162d3015c8705dd2231e34703/src/cmd/dist/buildtool.go#L121-L125
-		/usr/local/go/pkg/bootstrap \
-# https://golang.org/cl/82095
-# https://github.com/golang/build/blob/e3fe1605c30f6a3fd136b561569933312ede8782/cmd/release/releaselet.go#L56
-		/usr/local/go/pkg/obj \
-	; \
-	apk del .build-deps; \
-	\
-	export PATH="/usr/local/go/bin:$PATH"; \
-	go version
-
-ENV GOPATH /go
-ENV PATH $GOPATH/bin:/usr/local/go/bin:$PATH
-
-RUN mkdir -p "$GOPATH/src" "$GOPATH/bin" && chmod -R 777 "$GOPATH"
-WORKDIR $GOPATH
diff --git a/1.12-rc/release-architectures b/1.12-rc/release-architectures
deleted file mode 100644
index 6b7fa2c8..00000000
--- a/1.12-rc/release-architectures
+++ /dev/null
@@ -1,9 +0,0 @@
-# see https://golang.org/dl/
-
-# bashbrew-arch dpkg-arch golang-release-arch
-amd64   amd64   amd64
-arm32v7 armhf   armv6l
-arm64v8 arm64   arm64
-i386    i386    386
-ppc64le ppc64el ppc64le
-s390x   s390x   s390x
diff --git a/1.12-rc/stretch/Dockerfile b/1.12-rc/stretch/Dockerfile
deleted file mode 100644
index a8b9d5b4..00000000
--- a/1.12-rc/stretch/Dockerfile
+++ /dev/null
@@ -1,50 +0,0 @@
-FROM buildpack-deps:stretch-scm
-
-# gcc for cgo
-RUN apt-get update && apt-get install -y --no-install-recommends \
-		g++ \
-		gcc \
-		libc6-dev \
-		make \
-		pkg-config \
-	&& rm -rf /var/lib/apt/lists/*
-
-ENV GOLANG_VERSION 1.12rc1
-
-RUN set -eux; \
-	\
-# this "case" statement is generated via "update.sh"
-	dpkgArch="$(dpkg --print-architecture)"; \
-	case "${dpkgArch##*-}" in \
-		amd64) goRelArch='linux-amd64'; goRelSha256='e5a03e1f2e065b17b2fbbd3429f18a6f51fe2848e0120586652b9f14ada72c9a' ;; \
-		armhf) goRelArch='linux-armv6l'; goRelSha256='62126e4ca72e2fea9856fe0ec1a0f28cf1b385fb362d32cb56413c39cab318f8' ;; \
-		arm64) goRelArch='linux-arm64'; goRelSha256='654b90f75902d501e2201a7b438965132fd1242a102f54529e9ff7dbbdf0d4bb' ;; \
-		i386) goRelArch='linux-386'; goRelSha256='1d8615576655decbadeefcfaa6d5144b370dbea67fd4b426f58b573deedbd918' ;; \
-		ppc64el) goRelArch='linux-ppc64le'; goRelSha256='cb6c7ba83ee8211da1d13d6db148adfdd6b86a790d3974d0c5702d229ca1da40' ;; \
-		s390x) goRelArch='linux-s390x'; goRelSha256='40208d21fca8469c20054e67250f288ab62d68794690aa2c0324d67018ba99c2' ;; \
-		*) goRelArch='src'; goRelSha256='ed1d4f8e8a33f0d4a59a2f642584c7c6375fce2f8a4edaece73309cf2c89b8ee'; \
-			echo >&2; echo >&2 "warning: current architecture ($dpkgArch) does not have a corresponding Go binary release; will be building from source"; echo >&2 ;; \
-	esac; \
-	\
-	url="https://golang.org/dl/go${GOLANG_VERSION}.${goRelArch}.tar.gz"; \
-	wget -O go.tgz "$url"; \
-	echo "${goRelSha256} *go.tgz" | sha256sum -c -; \
-	tar -C /usr/local -xzf go.tgz; \
-	rm go.tgz; \
-	\
-	if [ "$goRelArch" = 'src' ]; then \
-		echo >&2; \
-		echo >&2 'error: UNIMPLEMENTED'; \
-		echo >&2 'TODO install golang-any from jessie-backports for GOROOT_BOOTSTRAP (and uninstall after build)'; \
-		echo >&2; \
-		exit 1; \
-	fi; \
-	\
-	export PATH="/usr/local/go/bin:$PATH"; \
-	go version
-
-ENV GOPATH /go
-ENV PATH $GOPATH/bin:/usr/local/go/bin:$PATH
-
-RUN mkdir -p "$GOPATH/src" "$GOPATH/bin" && chmod -R 777 "$GOPATH"
-WORKDIR $GOPATH
diff --git a/1.12-rc/windows/nanoserver-sac2016/Dockerfile b/1.12-rc/windows/nanoserver-sac2016/Dockerfile
deleted file mode 100644
index 8be87ef3..00000000
--- a/1.12-rc/windows/nanoserver-sac2016/Dockerfile
+++ /dev/null
@@ -1,43 +0,0 @@
-FROM mcr.microsoft.com/windows/nanoserver:sac2016
-
-# $ProgressPreference: https://github.com/PowerShell/PowerShell/issues/2138#issuecomment-251261324
-SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]
-
-# no Git installed (intentionally)
-#  -- Nano Server is "Windows Slim"
-
-# ideally, this would be C:\go to match Linux a bit closer, but C:\go is the recommended install path for Go itself on Windows
-ENV GOPATH C:\\gopath
-
-# PATH isn't actually set in the Docker image, so we have to set it from within the container
-RUN $newPath = ('{0}\bin;C:\go\bin;{1}' -f $env:GOPATH, $env:PATH); \
-	Write-Host ('Updating PATH: {0}' -f $newPath); \
-# Nano Server does not have "[Environment]::SetEnvironmentVariable()"
-	setx /M PATH $newPath;
-# doing this first to share cache across versions more aggressively
-
-ENV GOLANG_VERSION 1.12rc1
-
-RUN $url = ('https://golang.org/dl/go{0}.windows-amd64.zip' -f $env:GOLANG_VERSION); \
-	Write-Host ('Downloading {0} ...' -f $url); \
-	Invoke-WebRequest -Uri $url -OutFile 'go.zip'; \
-	\
-	$sha256 = 'cf3e163c6106f4f272816fa53d1e01e0cabff8dd797732f46513bbc5ea4f1843'; \
-	Write-Host ('Verifying sha256 ({0}) ...' -f $sha256); \
-	if ((Get-FileHash go.zip -Algorithm sha256).Hash -ne $sha256) { \
-		Write-Host 'FAILED!'; \
-		exit 1; \
-	}; \
-	\
-	Write-Host 'Expanding ...'; \
-	Expand-Archive go.zip -DestinationPath C:\; \
-	\
-	Write-Host 'Verifying install ("go version") ...'; \
-	go version; \
-	\
-	Write-Host 'Removing ...'; \
-	Remove-Item go.zip -Force; \
-	\
-	Write-Host 'Complete.';
-
-WORKDIR $GOPATH
diff --git a/1.12-rc/windows/windowsservercore-1709/Dockerfile b/1.12-rc/windows/windowsservercore-1709/Dockerfile
deleted file mode 100644
index d54cd1d3..00000000
--- a/1.12-rc/windows/windowsservercore-1709/Dockerfile
+++ /dev/null
@@ -1,73 +0,0 @@
-FROM mcr.microsoft.com/windows/servercore:1709
-
-# $ProgressPreference: https://github.com/PowerShell/PowerShell/issues/2138#issuecomment-251261324
-SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]
-
-# install MinGit (especially for "go get")
-# https://blogs.msdn.microsoft.com/visualstudioalm/2016/09/03/whats-new-in-git-for-windows-2-10/
-# "Essentially, it is a Git for Windows that was stripped down as much as possible without sacrificing the functionality in which 3rd-party software may be interested."
-# "It currently requires only ~45MB on disk."
-ENV GIT_VERSION 2.11.1
-ENV GIT_TAG v${GIT_VERSION}.windows.1
-ENV GIT_DOWNLOAD_URL https://github.com/git-for-windows/git/releases/download/${GIT_TAG}/MinGit-${GIT_VERSION}-64-bit.zip
-ENV GIT_DOWNLOAD_SHA256 668d16a799dd721ed126cc91bed49eb2c072ba1b25b50048280a4e2c5ed56e59
-# steps inspired by "chcolateyInstall.ps1" from "git.install" (https://chocolatey.org/packages/git.install)
-RUN Write-Host ('Downloading {0} ...' -f $env:GIT_DOWNLOAD_URL); \
-	[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; \
-	Invoke-WebRequest -Uri $env:GIT_DOWNLOAD_URL -OutFile 'git.zip'; \
-	\
-	Write-Host ('Verifying sha256 ({0}) ...' -f $env:GIT_DOWNLOAD_SHA256); \
-	if ((Get-FileHash git.zip -Algorithm sha256).Hash -ne $env:GIT_DOWNLOAD_SHA256) { \
-		Write-Host 'FAILED!'; \
-		exit 1; \
-	}; \
-	\
-	Write-Host 'Expanding ...'; \
-	Expand-Archive -Path git.zip -DestinationPath C:\git\.; \
-	\
-	Write-Host 'Removing ...'; \
-	Remove-Item git.zip -Force; \
-	\
-	Write-Host 'Updating PATH ...'; \
-	$env:PATH = 'C:\git\cmd;C:\git\mingw64\bin;C:\git\usr\bin;' + $env:PATH; \
-	[Environment]::SetEnvironmentVariable('PATH', $env:PATH, [EnvironmentVariableTarget]::Machine); \
-	\
-	Write-Host 'Verifying install ...'; \
-	Write-Host '  git --version'; git --version; \
-	\
-	Write-Host 'Complete.';
-
-# ideally, this would be C:\go to match Linux a bit closer, but C:\go is the recommended install path for Go itself on Windows
-ENV GOPATH C:\\gopath
-
-# PATH isn't actually set in the Docker image, so we have to set it from within the container
-RUN $newPath = ('{0}\bin;C:\go\bin;{1}' -f $env:GOPATH, $env:PATH); \
-	Write-Host ('Updating PATH: {0}' -f $newPath); \
-	[Environment]::SetEnvironmentVariable('PATH', $newPath, [EnvironmentVariableTarget]::Machine);
-# doing this first to share cache across versions more aggressively
-
-ENV GOLANG_VERSION 1.12rc1
-
-RUN $url = ('https://golang.org/dl/go{0}.windows-amd64.zip' -f $env:GOLANG_VERSION); \
-	Write-Host ('Downloading {0} ...' -f $url); \
-	Invoke-WebRequest -Uri $url -OutFile 'go.zip'; \
-	\
-	$sha256 = 'cf3e163c6106f4f272816fa53d1e01e0cabff8dd797732f46513bbc5ea4f1843'; \
-	Write-Host ('Verifying sha256 ({0}) ...' -f $sha256); \
-	if ((Get-FileHash go.zip -Algorithm sha256).Hash -ne $sha256) { \
-		Write-Host 'FAILED!'; \
-		exit 1; \
-	}; \
-	\
-	Write-Host 'Expanding ...'; \
-	Expand-Archive go.zip -DestinationPath C:\; \
-	\
-	Write-Host 'Verifying install ("go version") ...'; \
-	go version; \
-	\
-	Write-Host 'Removing ...'; \
-	Remove-Item go.zip -Force; \
-	\
-	Write-Host 'Complete.';
-
-WORKDIR $GOPATH
diff --git a/1.12-rc/windows/windowsservercore-1803/Dockerfile b/1.12-rc/windows/windowsservercore-1803/Dockerfile
deleted file mode 100644
index c0c8d263..00000000
--- a/1.12-rc/windows/windowsservercore-1803/Dockerfile
+++ /dev/null
@@ -1,73 +0,0 @@
-FROM mcr.microsoft.com/windows/servercore:1803
-
-# $ProgressPreference: https://github.com/PowerShell/PowerShell/issues/2138#issuecomment-251261324
-SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]
-
-# install MinGit (especially for "go get")
-# https://blogs.msdn.microsoft.com/visualstudioalm/2016/09/03/whats-new-in-git-for-windows-2-10/
-# "Essentially, it is a Git for Windows that was stripped down as much as possible without sacrificing the functionality in which 3rd-party software may be interested."
-# "It currently requires only ~45MB on disk."
-ENV GIT_VERSION 2.11.1
-ENV GIT_TAG v${GIT_VERSION}.windows.1
-ENV GIT_DOWNLOAD_URL https://github.com/git-for-windows/git/releases/download/${GIT_TAG}/MinGit-${GIT_VERSION}-64-bit.zip
-ENV GIT_DOWNLOAD_SHA256 668d16a799dd721ed126cc91bed49eb2c072ba1b25b50048280a4e2c5ed56e59
-# steps inspired by "chcolateyInstall.ps1" from "git.install" (https://chocolatey.org/packages/git.install)
-RUN Write-Host ('Downloading {0} ...' -f $env:GIT_DOWNLOAD_URL); \
-	[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; \
-	Invoke-WebRequest -Uri $env:GIT_DOWNLOAD_URL -OutFile 'git.zip'; \
-	\
-	Write-Host ('Verifying sha256 ({0}) ...' -f $env:GIT_DOWNLOAD_SHA256); \
-	if ((Get-FileHash git.zip -Algorithm sha256).Hash -ne $env:GIT_DOWNLOAD_SHA256) { \
-		Write-Host 'FAILED!'; \
-		exit 1; \
-	}; \
-	\
-	Write-Host 'Expanding ...'; \
-	Expand-Archive -Path git.zip -DestinationPath C:\git\.; \
-	\
-	Write-Host 'Removing ...'; \
-	Remove-Item git.zip -Force; \
-	\
-	Write-Host 'Updating PATH ...'; \
-	$env:PATH = 'C:\git\cmd;C:\git\mingw64\bin;C:\git\usr\bin;' + $env:PATH; \
-	[Environment]::SetEnvironmentVariable('PATH', $env:PATH, [EnvironmentVariableTarget]::Machine); \
-	\
-	Write-Host 'Verifying install ...'; \
-	Write-Host '  git --version'; git --version; \
-	\
-	Write-Host 'Complete.';
-
-# ideally, this would be C:\go to match Linux a bit closer, but C:\go is the recommended install path for Go itself on Windows
-ENV GOPATH C:\\gopath
-
-# PATH isn't actually set in the Docker image, so we have to set it from within the container
-RUN $newPath = ('{0}\bin;C:\go\bin;{1}' -f $env:GOPATH, $env:PATH); \
-	Write-Host ('Updating PATH: {0}' -f $newPath); \
-	[Environment]::SetEnvironmentVariable('PATH', $newPath, [EnvironmentVariableTarget]::Machine);
-# doing this first to share cache across versions more aggressively
-
-ENV GOLANG_VERSION 1.12rc1
-
-RUN $url = ('https://golang.org/dl/go{0}.windows-amd64.zip' -f $env:GOLANG_VERSION); \
-	Write-Host ('Downloading {0} ...' -f $url); \
-	Invoke-WebRequest -Uri $url -OutFile 'go.zip'; \
-	\
-	$sha256 = 'cf3e163c6106f4f272816fa53d1e01e0cabff8dd797732f46513bbc5ea4f1843'; \
-	Write-Host ('Verifying sha256 ({0}) ...' -f $sha256); \
-	if ((Get-FileHash go.zip -Algorithm sha256).Hash -ne $sha256) { \
-		Write-Host 'FAILED!'; \
-		exit 1; \
-	}; \
-	\
-	Write-Host 'Expanding ...'; \
-	Expand-Archive go.zip -DestinationPath C:\; \
-	\
-	Write-Host 'Verifying install ("go version") ...'; \
-	go version; \
-	\
-	Write-Host 'Removing ...'; \
-	Remove-Item go.zip -Force; \
-	\
-	Write-Host 'Complete.';
-
-WORKDIR $GOPATH
diff --git a/1.12-rc/windows/windowsservercore-1809/Dockerfile b/1.12-rc/windows/windowsservercore-1809/Dockerfile
deleted file mode 100644
index 5a9b9f69..00000000
--- a/1.12-rc/windows/windowsservercore-1809/Dockerfile
+++ /dev/null
@@ -1,73 +0,0 @@
-FROM mcr.microsoft.com/windows/servercore:1809
-
-# $ProgressPreference: https://github.com/PowerShell/PowerShell/issues/2138#issuecomment-251261324
-SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]
-
-# install MinGit (especially for "go get")
-# https://blogs.msdn.microsoft.com/visualstudioalm/2016/09/03/whats-new-in-git-for-windows-2-10/
-# "Essentially, it is a Git for Windows that was stripped down as much as possible without sacrificing the functionality in which 3rd-party software may be interested."
-# "It currently requires only ~45MB on disk."
-ENV GIT_VERSION 2.11.1
-ENV GIT_TAG v${GIT_VERSION}.windows.1
-ENV GIT_DOWNLOAD_URL https://github.com/git-for-windows/git/releases/download/${GIT_TAG}/MinGit-${GIT_VERSION}-64-bit.zip
-ENV GIT_DOWNLOAD_SHA256 668d16a799dd721ed126cc91bed49eb2c072ba1b25b50048280a4e2c5ed56e59
-# steps inspired by "chcolateyInstall.ps1" from "git.install" (https://chocolatey.org/packages/git.install)
-RUN Write-Host ('Downloading {0} ...' -f $env:GIT_DOWNLOAD_URL); \
-	[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; \
-	Invoke-WebRequest -Uri $env:GIT_DOWNLOAD_URL -OutFile 'git.zip'; \
-	\
-	Write-Host ('Verifying sha256 ({0}) ...' -f $env:GIT_DOWNLOAD_SHA256); \
-	if ((Get-FileHash git.zip -Algorithm sha256).Hash -ne $env:GIT_DOWNLOAD_SHA256) { \
-		Write-Host 'FAILED!'; \
-		exit 1; \
-	}; \
-	\
-	Write-Host 'Expanding ...'; \
-	Expand-Archive -Path git.zip -DestinationPath C:\git\.; \
-	\
-	Write-Host 'Removing ...'; \
-	Remove-Item git.zip -Force; \
-	\
-	Write-Host 'Updating PATH ...'; \
-	$env:PATH = 'C:\git\cmd;C:\git\mingw64\bin;C:\git\usr\bin;' + $env:PATH; \
-	[Environment]::SetEnvironmentVariable('PATH', $env:PATH, [EnvironmentVariableTarget]::Machine); \
-	\
-	Write-Host 'Verifying install ...'; \
-	Write-Host '  git --version'; git --version; \
-	\
-	Write-Host 'Complete.';
-
-# ideally, this would be C:\go to match Linux a bit closer, but C:\go is the recommended install path for Go itself on Windows
-ENV GOPATH C:\\gopath
-
-# PATH isn't actually set in the Docker image, so we have to set it from within the container
-RUN $newPath = ('{0}\bin;C:\go\bin;{1}' -f $env:GOPATH, $env:PATH); \
-	Write-Host ('Updating PATH: {0}' -f $newPath); \
-	[Environment]::SetEnvironmentVariable('PATH', $newPath, [EnvironmentVariableTarget]::Machine);
-# doing this first to share cache across versions more aggressively
-
-ENV GOLANG_VERSION 1.12rc1
-
-RUN $url = ('https://golang.org/dl/go{0}.windows-amd64.zip' -f $env:GOLANG_VERSION); \
-	Write-Host ('Downloading {0} ...' -f $url); \
-	Invoke-WebRequest -Uri $url -OutFile 'go.zip'; \
-	\
-	$sha256 = 'cf3e163c6106f4f272816fa53d1e01e0cabff8dd797732f46513bbc5ea4f1843'; \
-	Write-Host ('Verifying sha256 ({0}) ...' -f $sha256); \
-	if ((Get-FileHash go.zip -Algorithm sha256).Hash -ne $sha256) { \
-		Write-Host 'FAILED!'; \
-		exit 1; \
-	}; \
-	\
-	Write-Host 'Expanding ...'; \
-	Expand-Archive go.zip -DestinationPath C:\; \
-	\
-	Write-Host 'Verifying install ("go version") ...'; \
-	go version; \
-	\
-	Write-Host 'Removing ...'; \
-	Remove-Item go.zip -Force; \
-	\
-	Write-Host 'Complete.';
-
-WORKDIR $GOPATH
diff --git a/1.12-rc/windows/windowsservercore-ltsc2016/Dockerfile b/1.12-rc/windows/windowsservercore-ltsc2016/Dockerfile
deleted file mode 100644
index 952ccbfc..00000000
--- a/1.12-rc/windows/windowsservercore-ltsc2016/Dockerfile
+++ /dev/null
@@ -1,73 +0,0 @@
-FROM mcr.microsoft.com/windows/servercore:ltsc2016
-
-# $ProgressPreference: https://github.com/PowerShell/PowerShell/issues/2138#issuecomment-251261324
-SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]
-
-# install MinGit (especially for "go get")
-# https://blogs.msdn.microsoft.com/visualstudioalm/2016/09/03/whats-new-in-git-for-windows-2-10/
-# "Essentially, it is a Git for Windows that was stripped down as much as possible without sacrificing the functionality in which 3rd-party software may be interested."
-# "It currently requires only ~45MB on disk."
-ENV GIT_VERSION 2.11.1
-ENV GIT_TAG v${GIT_VERSION}.windows.1
-ENV GIT_DOWNLOAD_URL https://github.com/git-for-windows/git/releases/download/${GIT_TAG}/MinGit-${GIT_VERSION}-64-bit.zip
-ENV GIT_DOWNLOAD_SHA256 668d16a799dd721ed126cc91bed49eb2c072ba1b25b50048280a4e2c5ed56e59
-# steps inspired by "chcolateyInstall.ps1" from "git.install" (https://chocolatey.org/packages/git.install)
-RUN Write-Host ('Downloading {0} ...' -f $env:GIT_DOWNLOAD_URL); \
-	[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; \
-	Invoke-WebRequest -Uri $env:GIT_DOWNLOAD_URL -OutFile 'git.zip'; \
-	\
-	Write-Host ('Verifying sha256 ({0}) ...' -f $env:GIT_DOWNLOAD_SHA256); \
-	if ((Get-FileHash git.zip -Algorithm sha256).Hash -ne $env:GIT_DOWNLOAD_SHA256) { \
-		Write-Host 'FAILED!'; \
-		exit 1; \
-	}; \
-	\
-	Write-Host 'Expanding ...'; \
-	Expand-Archive -Path git.zip -DestinationPath C:\git\.; \
-	\
-	Write-Host 'Removing ...'; \
-	Remove-Item git.zip -Force; \
-	\
-	Write-Host 'Updating PATH ...'; \
-	$env:PATH = 'C:\git\cmd;C:\git\mingw64\bin;C:\git\usr\bin;' + $env:PATH; \
-	[Environment]::SetEnvironmentVariable('PATH', $env:PATH, [EnvironmentVariableTarget]::Machine); \
-	\
-	Write-Host 'Verifying install ...'; \
-	Write-Host '  git --version'; git --version; \
-	\
-	Write-Host 'Complete.';
-
-# ideally, this would be C:\go to match Linux a bit closer, but C:\go is the recommended install path for Go itself on Windows
-ENV GOPATH C:\\gopath
-
-# PATH isn't actually set in the Docker image, so we have to set it from within the container
-RUN $newPath = ('{0}\bin;C:\go\bin;{1}' -f $env:GOPATH, $env:PATH); \
-	Write-Host ('Updating PATH: {0}' -f $newPath); \
-	[Environment]::SetEnvironmentVariable('PATH', $newPath, [EnvironmentVariableTarget]::Machine);
-# doing this first to share cache across versions more aggressively
-
-ENV GOLANG_VERSION 1.12rc1
-
-RUN $url = ('https://golang.org/dl/go{0}.windows-amd64.zip' -f $env:GOLANG_VERSION); \
-	Write-Host ('Downloading {0} ...' -f $url); \
-	Invoke-WebRequest -Uri $url -OutFile 'go.zip'; \
-	\
-	$sha256 = 'cf3e163c6106f4f272816fa53d1e01e0cabff8dd797732f46513bbc5ea4f1843'; \
-	Write-Host ('Verifying sha256 ({0}) ...' -f $sha256); \
-	if ((Get-FileHash go.zip -Algorithm sha256).Hash -ne $sha256) { \
-		Write-Host 'FAILED!'; \
-		exit 1; \
-	}; \
-	\
-	Write-Host 'Expanding ...'; \
-	Expand-Archive go.zip -DestinationPath C:\; \
-	\
-	Write-Host 'Verifying install ("go version") ...'; \
-	go version; \
-	\
-	Write-Host 'Removing ...'; \
-	Remove-Item go.zip -Force; \
-	\
-	Write-Host 'Complete.';
-
-WORKDIR $GOPATH
diff --git a/1.10/alpine3.9/Dockerfile b/1.12/alpine3.9/Dockerfile
similarity index 93%
rename from 1.10/alpine3.9/Dockerfile
rename to 1.12/alpine3.9/Dockerfile
index 4fd34216..7971f582 100644
--- a/1.10/alpine3.9/Dockerfile
+++ b/1.12/alpine3.9/Dockerfile
@@ -8,7 +8,7 @@ RUN apk add --no-cache \
 # - docker run --rm debian:stretch grep '^hosts:' /etc/nsswitch.conf
 RUN [ ! -e /etc/nsswitch.conf ] && echo 'hosts: files dns' > /etc/nsswitch.conf
 
-ENV GOLANG_VERSION 1.10.8
+ENV GOLANG_VERSION 1.12
 
 RUN set -eux; \
 	apk add --no-cache --virtual .build-deps \
@@ -37,7 +37,7 @@ RUN set -eux; \
 	esac; \
 	\
 	wget -O go.tgz "https://golang.org/dl/go$GOLANG_VERSION.src.tar.gz"; \
-	echo '6faf74046b5e24c2c0b46e78571cca4d65e1b89819da1089e53ea57539c63491 *go.tgz' | sha256sum -c -; \
+	echo '09c43d3336743866f2985f566db0520b36f4992aea2b4b2fd9f52f17049e88f2 *go.tgz' | sha256sum -c -; \
 	tar -C /usr/local -xzf go.tgz; \
 	rm go.tgz; \
 	\
diff --git a/1.10/release-architectures b/1.12/release-architectures
similarity index 100%
rename from 1.10/release-architectures
rename to 1.12/release-architectures
diff --git a/1.10/stretch/Dockerfile b/1.12/stretch/Dockerfile
similarity index 57%
rename from 1.10/stretch/Dockerfile
rename to 1.12/stretch/Dockerfile
index 893a0535..54db0f12 100644
--- a/1.10/stretch/Dockerfile
+++ b/1.12/stretch/Dockerfile
@@ -9,20 +9,20 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 		pkg-config \
 	&& rm -rf /var/lib/apt/lists/*
 
-ENV GOLANG_VERSION 1.10.8
+ENV GOLANG_VERSION 1.12
 
 RUN set -eux; \
 	\
 # this "case" statement is generated via "update.sh"
 	dpkgArch="$(dpkg --print-architecture)"; \
 	case "${dpkgArch##*-}" in \
-		amd64) goRelArch='linux-amd64'; goRelSha256='d8626fb6f9a3ab397d88c483b576be41fa81eefcec2fd18562c87626dbb3c39e' ;; \
-		armhf) goRelArch='linux-armv6l'; goRelSha256='6fdbc67524fc4c15fc87014869dddce9ecda7958b78f3cb1bbc5b0a9b61bfb95' ;; \
-		arm64) goRelArch='linux-arm64'; goRelSha256='0921a76e78022ec2ae217e85b04940e2e9912b4c3218d96a827deedb9abe1c7b' ;; \
-		i386) goRelArch='linux-386'; goRelSha256='10202da0b7f2a0f2c2ec4dd65375584dd829ce88ccc58e5fe1fa1352e69fecaf' ;; \
-		ppc64el) goRelArch='linux-ppc64le'; goRelSha256='9054bcc7582ebb8a69ca43447a38e4b9ea11d08f05511cc7f13720e3a12ff299' ;; \
-		s390x) goRelArch='linux-s390x'; goRelSha256='6f71b189c6cf30f7736af21265e992990cb0374138b7a70b0880cf8579399a69' ;; \
-		*) goRelArch='src'; goRelSha256='6faf74046b5e24c2c0b46e78571cca4d65e1b89819da1089e53ea57539c63491'; \
+		amd64) goRelArch='linux-amd64'; goRelSha256='750a07fef8579ae4839458701f4df690e0b20b8bcce33b437e4df89c451b6f13' ;; \
+		armhf) goRelArch='linux-armv6l'; goRelSha256='ea0636f055763d309437461b5817452419411eb1f598dc7f35999fae05bcb79a' ;; \
+		arm64) goRelArch='linux-arm64'; goRelSha256='b7bf59c2f1ac48eb587817a2a30b02168ecc99635fc19b6e677cce01406e3fac' ;; \
+		i386) goRelArch='linux-386'; goRelSha256='3ac1db65a6fa5c13f424b53ee181755429df0c33775733cede1e0d540440fd7b' ;; \
+		ppc64el) goRelArch='linux-ppc64le'; goRelSha256='5be21e7035efa4a270802ea04fb104dc7a54e3492641ae44632170b93166fb68' ;; \
+		s390x) goRelArch='linux-s390x'; goRelSha256='c0aef360b99ebb4b834db8b5b22777b73a11fa37b382121b24bf587c40603915' ;; \
+		*) goRelArch='src'; goRelSha256='09c43d3336743866f2985f566db0520b36f4992aea2b4b2fd9f52f17049e88f2'; \
 			echo >&2; echo >&2 "warning: current architecture ($dpkgArch) does not have a corresponding Go binary release; will be building from source"; echo >&2 ;; \
 	esac; \
 	\
diff --git a/1.10/windows/nanoserver-sac2016/Dockerfile b/1.12/windows/nanoserver-sac2016/Dockerfile
similarity index 93%
rename from 1.10/windows/nanoserver-sac2016/Dockerfile
rename to 1.12/windows/nanoserver-sac2016/Dockerfile
index 1afad684..df93ea60 100644
--- a/1.10/windows/nanoserver-sac2016/Dockerfile
+++ b/1.12/windows/nanoserver-sac2016/Dockerfile
@@ -16,13 +16,13 @@ RUN $newPath = ('{0}\bin;C:\go\bin;{1}' -f $env:GOPATH, $env:PATH); \
 	setx /M PATH $newPath;
 # doing this first to share cache across versions more aggressively
 
-ENV GOLANG_VERSION 1.10.8
+ENV GOLANG_VERSION 1.12
 
 RUN $url = ('https://golang.org/dl/go{0}.windows-amd64.zip' -f $env:GOLANG_VERSION); \
 	Write-Host ('Downloading {0} ...' -f $url); \
 	Invoke-WebRequest -Uri $url -OutFile 'go.zip'; \
 	\
-	$sha256 = 'ab63b55c349f75cce4b93aefa9b52828f50ebafb302da5057db0e686d7873d7a'; \
+	$sha256 = '880ced1aecef08b3471a84381b6c7e2c0e846b81dd97ecb629b534d941f282bd'; \
 	Write-Host ('Verifying sha256 ({0}) ...' -f $sha256); \
 	if ((Get-FileHash go.zip -Algorithm sha256).Hash -ne $sha256) { \
 		Write-Host 'FAILED!'; \
diff --git a/1.10/windows/windowsservercore-1709/Dockerfile b/1.12/windows/windowsservercore-1709/Dockerfile
similarity index 96%
rename from 1.10/windows/windowsservercore-1709/Dockerfile
rename to 1.12/windows/windowsservercore-1709/Dockerfile
index 5f2d1668..67da46d6 100644
--- a/1.10/windows/windowsservercore-1709/Dockerfile
+++ b/1.12/windows/windowsservercore-1709/Dockerfile
@@ -46,13 +46,13 @@ RUN $newPath = ('{0}\bin;C:\go\bin;{1}' -f $env:GOPATH, $env:PATH); \
 	[Environment]::SetEnvironmentVariable('PATH', $newPath, [EnvironmentVariableTarget]::Machine);
 # doing this first to share cache across versions more aggressively
 
-ENV GOLANG_VERSION 1.10.8
+ENV GOLANG_VERSION 1.12
 
 RUN $url = ('https://golang.org/dl/go{0}.windows-amd64.zip' -f $env:GOLANG_VERSION); \
 	Write-Host ('Downloading {0} ...' -f $url); \
 	Invoke-WebRequest -Uri $url -OutFile 'go.zip'; \
 	\
-	$sha256 = 'ab63b55c349f75cce4b93aefa9b52828f50ebafb302da5057db0e686d7873d7a'; \
+	$sha256 = '880ced1aecef08b3471a84381b6c7e2c0e846b81dd97ecb629b534d941f282bd'; \
 	Write-Host ('Verifying sha256 ({0}) ...' -f $sha256); \
 	if ((Get-FileHash go.zip -Algorithm sha256).Hash -ne $sha256) { \
 		Write-Host 'FAILED!'; \
diff --git a/1.10/windows/windowsservercore-1803/Dockerfile b/1.12/windows/windowsservercore-1803/Dockerfile
similarity index 96%
rename from 1.10/windows/windowsservercore-1803/Dockerfile
rename to 1.12/windows/windowsservercore-1803/Dockerfile
index 4105966a..0000b626 100644
--- a/1.10/windows/windowsservercore-1803/Dockerfile
+++ b/1.12/windows/windowsservercore-1803/Dockerfile
@@ -46,13 +46,13 @@ RUN $newPath = ('{0}\bin;C:\go\bin;{1}' -f $env:GOPATH, $env:PATH); \
 	[Environment]::SetEnvironmentVariable('PATH', $newPath, [EnvironmentVariableTarget]::Machine);
 # doing this first to share cache across versions more aggressively
 
-ENV GOLANG_VERSION 1.10.8
+ENV GOLANG_VERSION 1.12
 
 RUN $url = ('https://golang.org/dl/go{0}.windows-amd64.zip' -f $env:GOLANG_VERSION); \
 	Write-Host ('Downloading {0} ...' -f $url); \
 	Invoke-WebRequest -Uri $url -OutFile 'go.zip'; \
 	\
-	$sha256 = 'ab63b55c349f75cce4b93aefa9b52828f50ebafb302da5057db0e686d7873d7a'; \
+	$sha256 = '880ced1aecef08b3471a84381b6c7e2c0e846b81dd97ecb629b534d941f282bd'; \
 	Write-Host ('Verifying sha256 ({0}) ...' -f $sha256); \
 	if ((Get-FileHash go.zip -Algorithm sha256).Hash -ne $sha256) { \
 		Write-Host 'FAILED!'; \
diff --git a/1.10/windows/windowsservercore-1809/Dockerfile b/1.12/windows/windowsservercore-1809/Dockerfile
similarity index 96%
rename from 1.10/windows/windowsservercore-1809/Dockerfile
rename to 1.12/windows/windowsservercore-1809/Dockerfile
index ced97282..af5b0b3e 100644
--- a/1.10/windows/windowsservercore-1809/Dockerfile
+++ b/1.12/windows/windowsservercore-1809/Dockerfile
@@ -46,13 +46,13 @@ RUN $newPath = ('{0}\bin;C:\go\bin;{1}' -f $env:GOPATH, $env:PATH); \
 	[Environment]::SetEnvironmentVariable('PATH', $newPath, [EnvironmentVariableTarget]::Machine);
 # doing this first to share cache across versions more aggressively
 
-ENV GOLANG_VERSION 1.10.8
+ENV GOLANG_VERSION 1.12
 
 RUN $url = ('https://golang.org/dl/go{0}.windows-amd64.zip' -f $env:GOLANG_VERSION); \
 	Write-Host ('Downloading {0} ...' -f $url); \
 	Invoke-WebRequest -Uri $url -OutFile 'go.zip'; \
 	\
-	$sha256 = 'ab63b55c349f75cce4b93aefa9b52828f50ebafb302da5057db0e686d7873d7a'; \
+	$sha256 = '880ced1aecef08b3471a84381b6c7e2c0e846b81dd97ecb629b534d941f282bd'; \
 	Write-Host ('Verifying sha256 ({0}) ...' -f $sha256); \
 	if ((Get-FileHash go.zip -Algorithm sha256).Hash -ne $sha256) { \
 		Write-Host 'FAILED!'; \
diff --git a/1.10/windows/windowsservercore-ltsc2016/Dockerfile b/1.12/windows/windowsservercore-ltsc2016/Dockerfile
similarity index 96%
rename from 1.10/windows/windowsservercore-ltsc2016/Dockerfile
rename to 1.12/windows/windowsservercore-ltsc2016/Dockerfile
index 83500644..79aaf736 100644
--- a/1.10/windows/windowsservercore-ltsc2016/Dockerfile
+++ b/1.12/windows/windowsservercore-ltsc2016/Dockerfile
@@ -46,13 +46,13 @@ RUN $newPath = ('{0}\bin;C:\go\bin;{1}' -f $env:GOPATH, $env:PATH); \
 	[Environment]::SetEnvironmentVariable('PATH', $newPath, [EnvironmentVariableTarget]::Machine);
 # doing this first to share cache across versions more aggressively
 
-ENV GOLANG_VERSION 1.10.8
+ENV GOLANG_VERSION 1.12
 
 RUN $url = ('https://golang.org/dl/go{0}.windows-amd64.zip' -f $env:GOLANG_VERSION); \
 	Write-Host ('Downloading {0} ...' -f $url); \
 	Invoke-WebRequest -Uri $url -OutFile 'go.zip'; \
 	\
-	$sha256 = 'ab63b55c349f75cce4b93aefa9b52828f50ebafb302da5057db0e686d7873d7a'; \
+	$sha256 = '880ced1aecef08b3471a84381b6c7e2c0e846b81dd97ecb629b534d941f282bd'; \
 	Write-Host ('Verifying sha256 ({0}) ...' -f $sha256); \
 	if ((Get-FileHash go.zip -Algorithm sha256).Hash -ne $sha256) { \
 		Write-Host 'FAILED!'; \
diff --git a/generate-stackbrew-library.sh b/generate-stackbrew-library.sh
index 9a058cf0..b027ba79 100755
--- a/generate-stackbrew-library.sh
+++ b/generate-stackbrew-library.sh
@@ -2,8 +2,8 @@
 set -Eeuo pipefail
 
 declare -A aliases=(
-	[1.11]='1 latest'
-	[1.12-rc]='rc'
+	[1.12]='1 latest'
+	[1.13-rc]='rc'
 )
 
 defaultDebianSuite='stretch'