diff --git a/pkgs/development/haskell-modules/configuration-ghc-8.8.x.nix b/pkgs/development/haskell-modules/configuration-ghc-8.8.x.nix
index 063452b053fe..9ab397323e5d 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-8.8.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-8.8.x.nix
@@ -84,7 +84,6 @@ self: super: {
     url = "https://raw.githubusercontent.com/hvr/head.hackage/master/patches/regex-posix-0.95.2.patch";
     sha256 = "006yli58jpqp786zm1xlncjsilc38iv3a09r4pv94l587sdzasd2";
   });
-  haskell-src-exts = super.haskell-src-exts;
   optparse-applicative = appendPatch (doJailbreak super.optparse-applicative) (pkgs.fetchpatch {
     url = "https://raw.githubusercontent.com/hvr/head.hackage/master/patches/optparse-applicative-0.14.3.0.patch";
     sha256 = "068sjj98jqiq3h8h03mg4w2pa11q8lxkx2i4lmxivq77xyhlwq3y";
@@ -93,7 +92,6 @@ self: super: {
     url = "https://raw.githubusercontent.com/hvr/head.hackage/master/patches/hackage-security-0.5.3.0.patch";
     sha256 = "0l8x0pbsn18fj5ak5q0g5rva4xw1s9yc4d86a1pfyaz467b9i5a4";
   });
-  happy = super.happy;
   hedgehog = appendPatch (doJailbreak super.hedgehog) (pkgs.fetchpatch {
     url = "https://gitlab.haskell.org/ghc/head.hackage/raw/master/patches/hedgehog-1.0.patch";
     sha256 = "16gadh1hb74jqvzc9c893sffb1y2vjglblyrqjwp7xfhccq7g8yw";
@@ -103,7 +101,6 @@ self: super: {
     url = "https://raw.githubusercontent.com/hvr/head.hackage/master/patches/regex-tdfa-1.2.3.1.patch";
     sha256 = "1lhas4s2ms666prb475gaw2bqw1v4y8cxi66sy20j727sx7ppjs7";
   });
-  attoparsec = super.attoparsec;
   cassava = appendPatch super.cassava (pkgs.fetchpatch {
     url = "https://raw.githubusercontent.com/hvr/head.hackage/master/patches/cassava-0.5.1.0.patch";
     sha256 = "11scwwjp94si90vb8v5yr291g9qwv5l223z8y0g0lc63932bp63g";