WIP: Disable GHC dwarf support. Adds traces. Does not work yet.

It does not work yet because of multiple GHCs in the build for `hello`,
and one of them still has dwarf support on and passeds the dwarf linker
flags.
Unclear why we have multiple GHCs in the build as direct depdendencies
of the `hello` package.

Author: nh2

survey/default.nix

@@ -170,6 +170,7 @@ let
           else pkgsToUseForSetupExe.haskell.packages."${compiler}";
     in
       haskellPackagesToUseForSetupExe.override (old: {
+        ghc = builtins.trace "c" old.ghc.override { enableDwarf = false; };
         overrides = pkgs.lib.composeExtensions (old.overrides or (_: _: {})) (self: super: {
 
           Cabal =
@@ -934,6 +935,7 @@ let
 
 
         haskellPackages = previousHaskellPackages.override (old: {
+          ghc = builtins.trace "a" old.ghc.override { enableDwarf = false; };
           overrides = final.lib.composeExtensions (old.overrides or (_: _: {})) (self: super:
             with final.haskell.lib;
             with final.staticHaskellHelpers;
@@ -1547,6 +1549,7 @@ let
   # Overlay all Haskell executables are statically linked.
   staticHaskellBinariesOverlay = final: previous: {
     haskellPackages = previous.haskellPackages.override (old: {
+      ghc = builtins.trace "b" old.ghc.override { enableDwarf = false; };
       overrides = final.lib.composeExtensions (old.overrides or (_: _: {})) (self: super:
         let
             # We have to use `useFixedCabal` here, and cannot just rely on the