diff --git a/pkgs/development/haskell-modules/hackage-packages.nix b/pkgs/development/haskell-modules/hackage-packages.nix
index bc58f54209d7..c4527bc09135 100644
--- a/pkgs/development/haskell-modules/hackage-packages.nix
+++ b/pkgs/development/haskell-modules/hackage-packages.nix
@@ -158582,7 +158582,7 @@ self: {
        license = lib.licenses.bsd3;
        hydraPlatforms = lib.platforms.none;
        broken = true;
-     }) {libpq = null;};
+     }) {inherit (pkgs) libpq;};
 
   "hpqtypes-effectful" = callPackage
     ({ mkDerivation, base, effectful-core, exceptions, hpqtypes
@@ -244347,7 +244347,7 @@ self: {
        doHaddock = false;
        description = "low-level binding to libpq: pkg-config based provider";
        license = lib.licenses.bsd3;
-     }) {libpq = null;};
+     }) {inherit (pkgs) libpq;};
 
   "postgresql-lo-stream" = callPackage
     ({ mkDerivation, base, bytestring, io-streams, lifted-base