tests.pkgs-lib: expose the tests included in it (#468941)

pkgs/pkgs-lib/tests/default.nix

@@ -51,10 +51,12 @@ let
 in
 
 # It has to be a link farm for inclusion in the hydra unstable jobset.
-pkgs.linkFarm "pkgs-lib-formats-tests" (
-  mapAttrsToList (k: v: {
-    name = k;
-    path = v;
-  }) (flatten "" structured)
-)
+{
+  formats-tests = pkgs.linkFarm "pkgs-lib-formats-tests" (
+    mapAttrsToList (k: v: {
+      name = k;
+      path = v;
+    }) (flatten "" structured)
+  );
+}
 // structured

pkgs/test/default.nix

@@ -219,7 +219,7 @@ in
     };
   };
 
-  pkgs-lib = recurseIntoAttrs (import ../pkgs-lib/tests { inherit pkgs; });
+  pkgs-lib = recurseIntoAttrs (callPackage ../pkgs-lib/tests { });
 
   buildFHSEnv = recurseIntoAttrs (callPackages ./buildFHSEnv { });
 

pkgs/top-level/release.nix

@@ -112,7 +112,6 @@ let
     manual = pkgs.nixpkgs-manual.override { inherit nixpkgs; };
     metrics = import ./metrics.nix { inherit pkgs nixpkgs; };
     lib-tests = import ../../lib/tests/release.nix { inherit pkgs; };
-    pkgs-lib-tests = import ../pkgs-lib/tests { inherit pkgs; };
 
     darwin-tested =
       if supportDarwin.x86_64 || supportDarwin.aarch64 then