diff --git a/pkgs/development/haskell-modules/configuration-common.nix b/pkgs/development/haskell-modules/configuration-common.nix
index 1ab376ab103..ba1e461feab 100644
--- a/pkgs/development/haskell-modules/configuration-common.nix
+++ b/pkgs/development/haskell-modules/configuration-common.nix
@@ -765,7 +765,7 @@ self: super: {
       };
     in overrideCabal super.servant (old: {
       postInstall = old.postInstall or "" + ''
-        ln -s ${docs} $doc/share/doc/servant
+        ln -s ${docs} ''${!outputDoc}/share/doc/servant
       '';
     });