Merge pull request #17145 from kalhauge/haskell_darwin_dyld

haskell-ghc: fix darwin issue

pkgs/development/haskell-modules/generic-builder.nix

···
       fi
       if [ -d "$p/lib" ]; then
         configureFlags+=" --extra-lib-dirs=$p/lib"
+        ${ stdenv.lib.optionalString stdenv.isDarwin
+            "export DYLD_LIBRARY_PATH=$DYLD_LIBRARY_PATH:$p/lib"
+        }
       fi
     done
     ${ghcCommand}-pkg --${packageDbFlag}="$packageConfDir" recache