modernize shell.nix

shell.nix

@@ -1,83 +1,15 @@
-{ nixpkgs ? import <nixpkgs> {}, compiler ? "default", doBenchmark ? false }:
+{ pkgs ? import <nixpkgs> {}}:
 
 let
-
+  # create a modified haskell package set with my package inside it and broken dependencies
-  inherit (nixpkgs) pkgs;
+  # jailbroken.
-
+  hpkgs = pkgs.haskellPackages.override {
-  pg-transact = with haskellPackages; callPackage(
+    overrides = hself: hsuper: {
-    { mkDerivation, async, base, bytestring, exceptions, hspec
+      mateamt = hself.callCabal2nix "mateamt" (gitignore ./.) {};
-    , hspec-expectations-lifted, lib, monad-control, postgresql-libpq
+      pg-transact = with pkgs.haskell.lib;
-    , postgresql-simple, tmp-postgres, transformers
+        doJailbreak (unmarkBroken (dontCheck hsuper.pg-transact));
-    }:
-    mkDerivation {
-      pname = "pg-transact";
-      version = "0.3.1.1";
-      sha256 = "8d5d61ebafdcb8e94d563e74bc9646519e45a2fddf327a708b0a59e5160c20fc";
-      libraryHaskellDepends = [
-        base bytestring exceptions monad-control postgresql-simple
-        transformers
-      ];
-      testHaskellDepends = [
-        async base bytestring exceptions hspec hspec-expectations-lifted
-        postgresql-libpq postgresql-simple tmp-postgres
-      ];
-      doCheck = false;
-      homepage = "https://github.com/jfischoff/pg-transact#readme";
-      description = "A postgresql-simple transaction monad";
-      license = lib.licenses.bsd3;
-    }) {};
-
-  f = { mkDerivation, aeson, base, base16-bytestring
-      , base64-bytestring, bytestring, case-insensitive, clock
-      , containers, directory, extra, haskell-gettext, hspec
-      , hspec-discover, hspec-wai, hspec-wai-json, http-api-data
-      , http-types, iproute, lib, libyaml, mime-mail, mtl, network, opaleye
-      , optparse-applicative, postgresql-simple
-      , postgresql-simple-migration, product-profunctors, profunctors
-      , pureMD5, random-bytestring, resource-pool, servant, servant-rawm
-      , servant-rawm-server, servant-server, stm, text, time
-      , tmp-postgres, wai, wai-logger, wai-middleware-throttle, warp
-      , yaml
-      }:
-      mkDerivation {
-        pname = "mateamt";
-        version = "0.0.0.0";
-        src = ./.;
-        isLibrary = true;
-        isExecutable = true;
-        libraryHaskellDepends = [
-          aeson base base16-bytestring base64-bytestring bytestring
-          containers directory extra haskell-gettext http-api-data http-types
-          libyaml mime-mail mtl opaleye postgresql-simple product-profunctors
-          profunctors pureMD5 random-bytestring servant servant-rawm
-          servant-rawm-server servant-server stm text time wai wai-logger
-          warp
-        ];
-        executableHaskellDepends = [
-          base base16-bytestring bytestring case-insensitive clock containers
-          iproute mtl network opaleye optparse-applicative postgresql-simple
-          postgresql-simple-migration servant servant-server stm text time
-          wai wai-logger wai-middleware-throttle warp yaml
-        ];
-        testHaskellDepends = [
-          base bytestring containers hspec hspec-wai hspec-wai-json mtl
-          pg-transact postgresql-simple resource-pool text time tmp-postgres
-          wai warp
-        ];
-        testToolDepends = [ hspec-discover ];
-        homepage = "https://gitea.nek0.eu/nek0/mateamt/";
-        description = "A whole new matemat";
-        license = lib.licenses.agpl3Plus;
     };
-
+  };
-  haskellPackages = if compiler == "default"
+  gitignore = dir: pkgs.nix-gitignore.gitignoreSource [] dir;
-                       then pkgs.haskellPackages
-                       else pkgs.haskell.packages.${compiler};
-
-  variant = if doBenchmark then pkgs.haskell.lib.doBenchmark else pkgs.lib.id;
-
-  drv = variant (haskellPackages.callPackage f {});
-
 in
-
+  hpkgs.mateamt.env
-  if pkgs.lib.inNixShell then drv.env else drv