diff --git a/modules/dev/default.nix b/modules/dev/default.nix
index 7d6d72a..a41e947 100644
--- a/modules/dev/default.nix
+++ b/modules/dev/default.nix
@@ -1 +1,3 @@
-{ ... }: { imports = [ ./nix.nix ./purescript.nix ./javascript.nix ]; }
+{ ... }: {
+  imports = [ ./nix.nix ./purescript.nix ./javascript.nix ./haskell ];
+}
diff --git a/modules/dev/haskell/default.nix b/modules/dev/haskell/default.nix
new file mode 100644
index 0000000..0cd6b48
--- /dev/null
+++ b/modules/dev/haskell/default.nix
@@ -0,0 +1,12 @@
+{ pkgs, ... }:
+let hie = pkgs.all-hies.selection { selector = p: { inherit (p) ghc865; }; };
+in {
+  home-manager.users.adrielus.home = {
+    file.".ghci".source = ./ghci;
+    # file.".stack/config.yaml".source = ./stack.yaml;
+
+    packages = with pkgs;
+      [ ghc ghcid hlint cabal-install snack stack hie ]
+      ++ (with haskellPackages; [ brittany hoogle hpack pointfree pointful ]);
+  };
+}
diff --git a/modules/dev/haskell/ghci b/modules/dev/haskell/ghci
new file mode 100644
index 0000000..efc3000
--- /dev/null
+++ b/modules/dev/haskell/ghci
@@ -0,0 +1,10 @@
+:def paste \_ -> do { paste <- System.Process.readProcess "pbpaste" [] ""; let cmd = if '\n' `elem` paste then ":{\ntype Ö = ()\n" ++ paste ++ "\n:}" else paste in putStrLn ("\SOH\ESC[33m\STX" ++ paste ++ "\SOH\ESC[0m\STX") >> return (":cmd return " ++ show cmd) }
+:def paste-quiet \_ -> do { paste <- System.Process.readProcess "pbpaste" [] ""; let cmd = if '\n' `elem` paste then ":{\ntype Ö = ()\n" ++ paste ++ "\n:}" else paste in return (":cmd return " ++ show cmd) }
+
+:def hoogle     \str -> return $ ":! hoogle search --color --count=10 " ++ show str
+:def hoogle-all \str -> return $ ":! hoogle search --color "            ++ show str
+:def doc        \str -> return $ ":! hoogle search --color --info "     ++ show str
+
+:def pointfree \str -> return $ ":! pointfree " ++ show str
+:def pf        \str -> return $ ":! pointfree " ++ show str
+:def pointful  \str -> return $ ":! pointful " ++ show str
\ No newline at end of file
diff --git a/modules/dev/haskell/stack.yaml b/modules/dev/haskell/stack.yaml
new file mode 100644
index 0000000..a4e4688
--- /dev/null
+++ b/modules/dev/haskell/stack.yaml
@@ -0,0 +1,5 @@
+templates:
+  params:
+    author-name: "Matei Adriel"
+    author-email: "rafaeladriel11@gmail.com"
+    github-username: "Mateiadrielrafael"
diff --git a/modules/overlay.nix b/modules/overlay.nix
index 27428e4..cfab1bf 100644
--- a/modules/overlay.nix
+++ b/modules/overlay.nix
@@ -9,13 +9,17 @@ in {
         inherit imports;
         inherit unstable;
 
+        inherit (import imports.niv { }) niv;
+
         cached-nix-shell = callPackage imports.cached-nix-shell { };
         easy-purescript-nix = callPackage imports.easy-purescript-nix { };
 
-        brave = unstable.brave;
+        all-hies = import imports.all-hies { };
+        snack = (import imports.snack).snack-exe;
 
-        inherit (import imports.niv { }) niv;
-        inherit (import imports.all-hies { }) all-hies;
+        # unstable stuff
+        brave = unstable.brave;
+        ghc = unstable.ghc;
       })
   ];
 
diff --git a/nix/sources.json b/nix/sources.json
index 5fd05a1..46accb4 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -106,5 +106,17 @@
         "type": "tarball",
         "url": "https://github.com/nixos/nixpkgs-channels/archive/9b0d2f3fd153167b0c8ce84bb71e766a39ed4c9d.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
+    },
+    "snack": {
+        "branch": "master",
+        "description": "Nix-based incremental build tool for Haskell projects",
+        "homepage": "",
+        "owner": "nmattia",
+        "repo": "snack",
+        "rev": "b638463b9a7490867b44d0c33bb02e8f7ca82f29",
+        "sha256": "02h4f0nrjvhsm7hvmrnc4kfi5my48d7yvind0f1kq1lsrcch6iph",
+        "type": "tarball",
+        "url": "https://github.com/nmattia/snack/archive/b638463b9a7490867b44d0c33bb02e8f7ca82f29.tar.gz",
+        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     }
 }