diff --git a/pkgs/build-support/cabal/default.nix b/pkgs/build-support/cabal/default.nix index b7c523f7181..83294373c1e 100644 --- a/pkgs/build-support/cabal/default.nix +++ b/pkgs/build-support/cabal/default.nix @@ -247,7 +247,7 @@ assert !enableStaticLibraries -> versionOlder "7.7" ghc.version; export GHC_PACKAGE_PATH=$(${ghc.GHCPackages}) test -n "$noHaddock" || ./Setup haddock --html --hoogle \ - --ghc-options=-optP-P \ + ${optionalString (stdenv.lib.versionOlder "6.12" ghc.version) "--ghc-options=-optP-P"} \ ${optionalString self.hyperlinkSource "--hyperlink-source"} eval "$postBuild"