diff --git a/.github/workflows/debian.yml b/.github/workflows/debian.yml
index 31ef6c4..46c444f 100644
--- a/.github/workflows/debian.yml
+++ b/.github/workflows/debian.yml
@@ -6,9 +6,14 @@ on:
       - master
     paths:
       - '**/buster/Dockerfile'
-      - '**/buster-slim/Dockerfile'
+      - '**/slim-buster/Dockerfile'
       - '.github/workflows/debian.yml'
 
+# See: https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions#concurrency.
+concurrency:
+  group: ${{ github.head_ref }}-${{ github.workflow }}
+  cancel-in-progress: true
+
 jobs:
   build-smoke-test:
     timeout-minutes: 30
@@ -18,7 +23,7 @@ jobs:
       fail-fast: false
       matrix:
         ghc: ['8.10.7', '9.0.2', '9.2.1']
-        deb: ['buster', 'buster-slim']
+        deb: ['buster', 'slim-buster']
         include:
           - ghc: '8.10.7'
             ghc_minor: '8.10'
diff --git a/8.10/buster-slim/Dockerfile b/8.10/slim-buster/Dockerfile
similarity index 99%
rename from 8.10/buster-slim/Dockerfile
rename to 8.10/slim-buster/Dockerfile
index f62caf9..23db616 100644
--- a/8.10/buster-slim/Dockerfile
+++ b/8.10/slim-buster/Dockerfile
@@ -16,11 +16,9 @@ RUN apt-get update && \
         libffi-dev \
         libgmp-dev \
         libnuma-dev \
-        libsqlite3-dev \
         libtinfo-dev \
         make \
         netbase \
-        openssh-client \
         xz-utils \
         zlib1g-dev && \
     rm -rf /var/lib/apt/lists/*
diff --git a/9.0/buster-slim/Dockerfile b/9.0/slim-buster/Dockerfile
similarity index 99%
rename from 9.0/buster-slim/Dockerfile
rename to 9.0/slim-buster/Dockerfile
index fbb7b6c..7c6fb7d 100644
--- a/9.0/buster-slim/Dockerfile
+++ b/9.0/slim-buster/Dockerfile
@@ -16,11 +16,9 @@ RUN apt-get update && \
         libffi-dev \
         libgmp-dev \
         libnuma-dev \
-        libsqlite3-dev \
         libtinfo-dev \
         make \
         netbase \
-        openssh-client \
         xz-utils \
         zlib1g-dev && \
     rm -rf /var/lib/apt/lists/*
diff --git a/9.2/buster-slim/Dockerfile b/9.2/slim-buster/Dockerfile
similarity index 99%
rename from 9.2/buster-slim/Dockerfile
rename to 9.2/slim-buster/Dockerfile
index 4069bb9..70fb858 100644
--- a/9.2/buster-slim/Dockerfile
+++ b/9.2/slim-buster/Dockerfile
@@ -16,11 +16,9 @@ RUN apt-get update && \
         libffi-dev \
         libgmp-dev \
         libnuma-dev \
-        libsqlite3-dev \
         libtinfo-dev \
         make \
         netbase \
-        openssh-client \
         xz-utils \
         zlib1g-dev && \
     rm -rf /var/lib/apt/lists/*