diff --git a/nixos/modules/services/misc/gitit.nix b/nixos/modules/services/misc/gitit.nix
index ceb186c0f049..87dd97166b8e 100644
--- a/nixos/modules/services/misc/gitit.nix
+++ b/nixos/modules/services/misc/gitit.nix
@@ -10,7 +10,7 @@ let
 
   toYesNo = b: if b then "yes" else "no";
 
-  gititShared = with cfg.haskellPackages; gitit + "/share/" + pkgs.stdenv.hostPlatform.system + "-" + ghc.name + "/" + gitit.pname + "-" + gitit.version;
+  gititShared = with cfg.haskellPackages; gitit + "/share/" + ghc.targetPrefix + ghc.haskellCompilerName + "/" + gitit.pname + "-" + gitit.version;
 
   gititWithPkgs = hsPkgs: extras: hsPkgs.ghcWithPackages (self: with self; [ gitit ] ++ (extras self));
 
diff --git a/pkgs/development/haskell-modules/configuration-common.nix b/pkgs/development/haskell-modules/configuration-common.nix
index 0302ca2e54ce..54366201b1dd 100644
--- a/pkgs/development/haskell-modules/configuration-common.nix
+++ b/pkgs/development/haskell-modules/configuration-common.nix
@@ -619,7 +619,7 @@ self: super: {
     doCheck = false;            # https://github.com/kazu-yamamoto/ghc-mod/issues/335
     executableToolDepends = drv.executableToolDepends or [] ++ [pkgs.buildPackages.emacs];
     postInstall = ''
-      local lispdir=( "$data/share/${self.ghc.name}/*/${drv.pname}-${drv.version}/elisp" )
+      local lispdir=( "$data/share/${self.ghc.targetPrefix}${self.ghc.haskellCompilerName}/*/${drv.pname}-${drv.version}/elisp" )
       make -C $lispdir
       mkdir -p $data/share/emacs/site-lisp
       ln -s "$lispdir/"*.el{,c} $data/share/emacs/site-lisp/
@@ -654,7 +654,7 @@ self: super: {
     # cannot easily byte-compile these files, unfortunately, because they
     # depend on a new version of haskell-mode that we don't have yet.
     postInstall = ''
-      local lispdir=( "$data/share/${self.ghc.name}/"*"/${drv.pname}-"*"/elisp" )
+      local lispdir=( "$data/share/${self.ghc.targetPrefix}${self.ghc.haskellCompilerName}/"*"/${drv.pname}-"*"/elisp" )
       mkdir -p $data/share/emacs
       ln -s $lispdir $data/share/emacs/site-lisp
     '';
@@ -665,7 +665,7 @@ self: super: {
     # We cannot easily byte-compile these files, unfortunately, because they
     # depend on a new version of haskell-mode that we don't have yet.
     postInstall = ''
-      local lispdir=( "$data/share/${self.ghc.name}/"*"/${drv.pname}-"*"/elisp" )
+      local lispdir=( "$data/share/${self.ghc.targetPrefix}${self.ghc.haskellCompilerName}/"*"/${drv.pname}-"*"/elisp" )
       mkdir -p $data/share/emacs
       ln -s $lispdir $data/share/emacs/site-lisp
     '';
diff --git a/pkgs/development/haskell-modules/generic-builder.nix b/pkgs/development/haskell-modules/generic-builder.nix
index a9692b5a0f01..bc43c39676c8 100644
--- a/pkgs/development/haskell-modules/generic-builder.nix
+++ b/pkgs/development/haskell-modules/generic-builder.nix
@@ -196,13 +196,13 @@ let
     "--prefix=$out"
     "--libdir=\\$prefix/lib/\\$compiler"
     "--libsubdir=\\$abi/\\$libname"
-    (optionalString enableSeparateDataOutput "--datadir=$data/share/${ghc.name}")
+    (optionalString enableSeparateDataOutput "--datadir=$data/share/${ghcNameWithPrefix}")
     (optionalString enableSeparateDocOutput "--docdir=${docdir "$doc"}")
   ] ++ optionals stdenv.hasCC [
     "--with-gcc=$CC" # Clang won't work without that extra information.
   ] ++ [
     "--package-db=$packageConfDir"
-    (optionalString (enableSharedExecutables && stdenv.isLinux) "--ghc-option=-optl=-Wl,-rpath=$out/lib/${ghc.name}/${pname}-${version}")
+    (optionalString (enableSharedExecutables && stdenv.isLinux) "--ghc-option=-optl=-Wl,-rpath=$out/lib/${ghcNameWithPrefix}/${pname}-${version}")
     (optionalString (enableSharedExecutables && stdenv.isDarwin) "--ghc-option=-optl=-Wl,-headerpad_max_install_names")
     (optionalString enableParallelBuilding "--ghc-options=${parallelBuildingFlags}")
     (optionalString useCpphs "--with-cpphs=${cpphs}/bin/cpphs --ghc-options=-cpp --ghc-options=-pgmP${cpphs}/bin/cpphs --ghc-options=-optP--cpp")
@@ -275,6 +275,8 @@ let
   ghcCommand' = if isGhcjs then "ghcjs" else "ghc";
   ghcCommand = "${ghc.targetPrefix}${ghcCommand'}";
 
+  ghcNameWithPrefix = "${ghc.targetPrefix}${ghc.haskellCompilerName}";
+
   nativeGhcCommand = "${nativeGhc.targetPrefix}ghc";
 
   buildPkgDb = ghcName: packageConfDir: ''
@@ -350,14 +352,14 @@ stdenv.mkDerivation ({
   # pkgs* arrays defined in stdenv/setup.hs
   + ''
     for p in "''${pkgsBuildBuild[@]}" "''${pkgsBuildHost[@]}" "''${pkgsBuildTarget[@]}"; do
-      ${buildPkgDb nativeGhc.name "$setupPackageConfDir"}
+      ${buildPkgDb "${nativeGhcCommand}-${nativeGhc.version}" "$setupPackageConfDir"}
     done
     ${nativeGhcCommand}-pkg --${nativePackageDbFlag}="$setupPackageConfDir" recache
   ''
   # For normal components
   + ''
     for p in "''${pkgsHostHost[@]}" "''${pkgsHostTarget[@]}"; do
-      ${buildPkgDb ghc.name "$packageConfDir"}
+      ${buildPkgDb ghcNameWithPrefix "$packageConfDir"}
       if [ -d "$p/include" ]; then
         configureFlags+=" --extra-include-dirs=$p/include"
       fi
@@ -494,7 +496,7 @@ stdenv.mkDerivation ({
       # just the target specified; "install" will error here, since not all targets have been built.
     else ''
       ${setupCommand} copy ${buildTarget}
-      local packageConfDir="$out/lib/${ghc.name}/package.conf.d"
+      local packageConfDir="$out/lib/${ghcNameWithPrefix}/package.conf.d"
       local packageConfFile="$packageConfDir/${pname}-${version}.conf"
       mkdir -p "$packageConfDir"
       ${setupCommand} register --gen-pkg-config=$packageConfFile
diff --git a/pkgs/development/haskell-modules/with-packages-wrapper.nix b/pkgs/development/haskell-modules/with-packages-wrapper.nix
index 7c7add61679d..c478c875540d 100644
--- a/pkgs/development/haskell-modules/with-packages-wrapper.nix
+++ b/pkgs/development/haskell-modules/with-packages-wrapper.nix
@@ -51,7 +51,7 @@ let
   ghcCommand = "${ghc.targetPrefix}${ghcCommand'}";
   ghcCommandCaps= lib.toUpper ghcCommand';
   libDir        = if isHaLVM then "$out/lib/HaLVM-${ghc.version}"
-                  else "$out/lib/${ghcCommand}-${ghc.version}";
+                  else "$out/lib/${ghc.targetPrefix}${ghc.haskellCompilerName}";
   docDir        = "$out/share/doc/ghc/html";
   packageCfgDir = "${libDir}/package.conf.d";
   paths         = lib.filter (x: x ? isHaskellLibrary) (lib.closePropagation packages);
@@ -121,7 +121,7 @@ symlinkJoin {
 
   '' + (lib.optionalString (stdenv.targetPlatform.isDarwin && !isGhcjs && !stdenv.targetPlatform.isiOS) ''
     # Work around a linker limit in macOS Sierra (see generic-builder.nix):
-    local packageConfDir="$out/lib/${ghc.name}/package.conf.d";
+    local packageConfDir="${packageCfgDir}";
     local dynamicLinksDir="$out/lib/links"
     mkdir -p $dynamicLinksDir
     # Clean up the old links that may have been (transitively) included by
@@ -148,8 +148,8 @@ symlinkJoin {
      # to another nix derivation, so they are not writable.  Removing
      # them allow the correct behavior of ghc-pkg recache
      # See: https://github.com/NixOS/nixpkgs/issues/79441
-     rm $out/lib/${ghc.name}/package.conf.d/package.cache.lock
-     rm $out/lib/${ghc.name}/package.conf.d/package.cache
+     rm ${packageCfgDir}/package.cache.lock
+     rm ${packageCfgDir}/package.cache
 
      $out/bin/${ghcCommand}-pkg recache
      ''}