top-level/release-haskell.nix: test static linking as well

This way we can keep track of any new regressions to this as well as
have some binary cache, so using this infrastructure doesn't require
compiling GHC all the time.

pkgs/top-level/release-haskell.nix

@@ -81,6 +81,9 @@ let
 
   recursiveUpdateMany = builtins.foldl' lib.recursiveUpdate {};
 
+  staticHaskellPackagesPlatforms =
+    packagePlatforms pkgs.pkgsStatic.haskellPackages;
+
   jobs = recursiveUpdateMany [
     (mapTestOn {
       haskellPackages = packagePlatforms pkgs.haskellPackages;
@@ -93,6 +96,16 @@ let
         writers = testPlatforms.writers;
       };
 
+      # test some statically linked packages to catch regressions
+      # and get some cache going for static compilation with GHC
+      pkgsStatic.haskellPackages = {
+        inherit (staticHaskellPackagesPlatforms)
+          hello
+          random
+          lens
+          ;
+      };
+
       # top-level packages that depend on haskellPackages
       inherit (pkgsPlatforms)
         agda
@@ -273,6 +286,17 @@ let
             (name: jobs.haskellPackages."${name}")
             (maintainedPkgNames pkgs.haskellPackages));
       };
+      staticHaskellPackages = pkgs.releaseTools.aggregate {
+        name = "static-haskell-packages";
+        meta = {
+          description = "Static haskell builds using the pkgsStatic infrastructure";
+          maintainers = [
+            lib.maintainers.sternenseemann
+            lib.maintainers.rnhmjoj
+          ];
+        };
+        constituents = accumulateDerivations [ jobs.pkgsStatic ];
+      };
     }
   ];