Try #1450:

Author: iohk-bors[bot]

builder/comp-builder.nix

@@ -346,10 +346,14 @@ let
          frameworks # Frameworks will be needed at link time
       # Not sure why pkgconfig needs to be propagatedBuildInputs but
       # for gi-gtk-hs it seems to help.
-      ++ builtins.concatLists pkgconfig;
+      ++ builtins.concatLists pkgconfig
+      ++ lib.optionals (stdenv.hostPlatform.isWindows)
+        (lib.flatten component.libs
+        ++ map haskellLib.dependToLib component.depends);
 
-    buildInputs = component.libs
-      ++ map haskellLib.dependToLib component.depends;
+    buildInputs = lib.optionals (!stdenv.hostPlatform.isWindows)
+      (lib.flatten component.libs
+      ++ map haskellLib.dependToLib component.depends);
 
     nativeBuildInputs =
       [shellWrappers buildPackages.removeReferencesTo]
@@ -482,22 +486,20 @@ let
         fi
       '')
       # In case `setup copy` did not create this
-      + (lib.optionalString enableSeparateDataOutput "mkdir -p $data")
+      + (lib.optionalString enableSeparateDataOutput ''
+         mkdir -p $data
+      '')
       + (lib.optionalString (stdenv.hostPlatform.isWindows && (haskellLib.mayHaveExecutable componentId)) (''
         echo "Symlink libffi and gmp .dlls ..."
         for p in ${lib.concatStringsSep " " [ libffi gmp ]}; do
           find "$p" -iname '*.dll' -exec ln -s {} $out/bin \;
         done
         ''
         # symlink all .dlls into the local directory.
-        # we ask ghc-pkg for *all* dynamic-library-dirs and then iterate over the unique set
-        # to symlink over dlls as needed.
         + ''
-        echo "Symlink library dependencies..."
-        for libdir in $(${stdenv.hostPlatform.config}-ghc-pkg field "*" dynamic-library-dirs --simple-output|xargs|sed 's/ /\n/g'|sort -u); do
-          if [ -d "$libdir" ]; then
-            find "$libdir" -iname '*.dll' -exec ln -s {} $out/bin \;
-          fi
+        for p in $pkgsHostTargetAsString; do
+          find "$p" -iname '*.dll' -exec ln -s {} $out/bin \;
+          find "$p" -iname '*.dll.a' -exec ln -s {} $out/bin \;
         done
       ''))
       + (lib.optionalString doCoverage ''

builder/make-config-files.nix

@@ -85,12 +85,12 @@ let
     ${target-pkg} init $out/${packageCfgDir}
 
     ${lib.concatStringsSep "\n" (lib.mapAttrsToList flagsAndConfig {
-      "extra-lib-dirs" = map (p: "${lib.getLib p}/lib") component.libs
+      "extra-lib-dirs" = map (p: "${lib.getLib p}/lib") (lib.flatten component.libs)
         # On windows also include `bin` directories that may contain DLLs
         ++ lib.optionals (stdenv.hostPlatform.isWindows)
           (map (p: "${lib.getBin p}/bin")
-               (component.libs ++ lib.concatLists component.pkgconfig));
-      "extra-include-dirs" = map (p: "${lib.getDev p}/include") component.libs;
+               (lib.flatten component.libs ++ lib.concatLists component.pkgconfig));
+      "extra-include-dirs" = map (p: "${lib.getDev p}/include") (lib.flatten component.libs);
       "extra-framework-dirs" = map (p: "${p}/Library/Frameworks") component.frameworks;
     })}
 

ci.nix

@@ -53,7 +53,12 @@
         # aarch64-darwin requires ghc 8.10.7 and does not work on older nixpkgs
         (v != "aarch64-darwin" || (
            !__elem compiler-nix-name ["ghc865" "ghc884" "ghc8104" "ghc810420210212" "ghc8105" "ghc8106" "ghc901" "ghc921"]
-        && !__elem nixpkgsName ["R2105"]))) supportedSystems) (v: v);
+        && !__elem nixpkgsName ["R2105"]))
+      &&
+        # aarch64-linux requires ghc 8.8.4
+        (v != "aarch64-linux" || (
+           !__elem compiler-nix-name ["ghc865" "ghc8104" "ghc810420210212" "ghc8105" "ghc8106" "ghc901" "ghc921"]
+        ))) supportedSystems) (v: v);
   crossSystems = nixpkgsName: nixpkgs: compiler-nix-name: system:
     # We need to use the actual nixpkgs version we're working with here, since the values
     # of 'lib.systems.examples' are not understood between all versions
@@ -63,10 +68,10 @@
        || (system == "x86_64-darwin" && __elem compiler-nix-name ["ghc8107"]))) {
     inherit (lib.systems.examples) ghcjs;
   } // lib.optionalAttrs (system == "x86_64-linux" &&
-         nixpkgsName == "unstable" && (__elem compiler-nix-name ["ghc810420210212" "ghc8107"])) {
+         nixpkgsName == "unstable" && (__elem compiler-nix-name ["ghc810420210212" "ghc8107" "ghc902" "ghc922"])) {
     # Windows cross compilation is currently broken on macOS
     inherit (lib.systems.examples) mingwW64;
-  } // lib.optionalAttrs (system == "x86_64-linux" && nixpkgsName == "unstable" && compiler-nix-name == "ghc8107") {
+  } // lib.optionalAttrs (system == "x86_64-linux" && nixpkgsName == "unstable" && __elem compiler-nix-name ["ghc8107" "ghc902" "ghc922"]) {
     # Musl cross only works on linux
     # aarch64 cross only works on linux
     inherit (lib.systems.examples) musl64 aarch64-multiplatform;