Add shell.nix

Author: ali-abrar

.gitignore

@@ -32,7 +32,6 @@ tags
 hsenv.log
 \#*#
 .#*
-/shell.nix
 /ghci-tmp
 *.dump-*
 *.verbose-core2core

release.nix

@@ -2,12 +2,12 @@
 }:
 
 let
-  native-reflex-platform = reflex-platform-fun {};
+  native-reflex-platform = reflex-platform-fun { __useNewerCompiler = true; };
   inherit (native-reflex-platform.nixpkgs) lib;
   systems = ["x86_64-linux" "x86_64-darwin"];
 
   perPlatform = lib.genAttrs systems (system: let
-    reflex-platform = reflex-platform-fun { inherit system; };
+    reflex-platform = reflex-platform-fun { inherit system; __useNewerCompiler = true; };
     compilers = [
       "ghc"
       "ghcjs"
@@ -20,6 +20,7 @@ let
     compilerPkgs = lib.genAttrs compilers (ghc: let
       reflex-platform = reflex-platform-fun {
         inherit system;
+        __useNewerCompiler = true;
         haskellOverlays = [
           # Use this package's source for reflex
           (self: super: {

shell.nix

@@ -0,0 +1,15 @@
+let
+  rp = import ./dep/reflex-platform { __useNewerCompiler = true; };
+  pkgs = rp.nixpkgs;
+  system = builtins.currentSystem;
+in
+  pkgs.mkShell {
+    name = "beam-automigrate";
+    buildInputs = [
+      pkgs.cabal-install
+      pkgs.ghcid
+    ];
+    inputsFrom = [
+      (import ./release.nix {}).${system}.ghc.env
+    ];
+  }