mateamt: build for all the ghc versions again

mateamt.nix

@@ -1,5 +1,14 @@
 { pkgs ? import <nixpkgs> {}
 }:
-{
-  mateamt = pkgs.lib.hydraJob (pkgs.haskellPackages.callPackage <mateamt> {});
-}
+let
+  ghcVersions =
+    builtins.filter (p:
+      p == "ghcHEAD" || builtins.match "ghc[[:digit:]]+" p != null
+    ) (builtins.attrNames pkgs.haskell.packages);
+  mateamt = haskellPackages: haskellPackages.callPackage <mateamt> {};
+in
+builtins.listToAttrs
+  (map (ghcVersion: {
+    name = "mateamter-${ghcVersion}";
+    value = pkgs.lib.hydraJob (mateamt (builtins.getAttr ghcVersion pkgs.haskell.packages));
+  }) ghcVersions)