diff --git a/pkgs/shells/fish/default.nix b/pkgs/shells/fish/default.nix
index e9555c7f21f..3969fdace8b 100644
--- a/pkgs/shells/fish/default.nix
+++ b/pkgs/shells/fish/default.nix
@@ -186,6 +186,7 @@ let
       rm tests/pexpects/exit_handlers.py
     '';
 
+    outputs = [ "out" "doc" ];
     strictDeps = true;
     nativeBuildInputs = [
       cmake
@@ -199,7 +200,7 @@ let
     ];
 
     cmakeFlags = [
-      "-DCMAKE_INSTALL_DOCDIR=${placeholder "out"}/share/doc/fish"
+      "-DCMAKE_INSTALL_DOCDIR=${placeholder "doc"}/share/doc/fish"
     ] ++ lib.optionals stdenv.isDarwin [
       "-DMAC_CODESIGN_ID=OFF"
     ];