diff --git a/nix/environments/haskell.nix b/nix/environments/haskell.nix
new file mode 100644
index 00000000..c92ca7e0
--- /dev/null
+++ b/nix/environments/haskell.nix
@@ -0,0 +1,22 @@
+{
+  buildEnv,
+  #
+  pkgs,
+}:
+buildEnv {
+  name = "haskell";
+  paths = with pkgs; [
+    #
+    # XMonad
+    #
+    (haskellPackages.ghcWithPackages (self: [
+      # https://github.com/ValveSoftware/steam-for-linux/issues/9376
+      # opt into 0.18.1 specifically
+      self.xmonad-contrib_0_18_1
+
+      self.xmonad-extras
+    ]))
+    haskell-language-server
+    cabal-install
+  ];
+}
diff --git a/shell.nix b/shell.nix
index ccfe367c..823840e2 100644
--- a/shell.nix
+++ b/shell.nix
@@ -17,19 +17,6 @@ pkgs.mkShell {
     just
     jq
 
-    #
-    # XMonad
-    #
-    (haskellPackages.ghcWithPackages (self: [
-      # https://github.com/ValveSoftware/steam-for-linux/issues/9376
-      # opt into 0.18.1 specifically
-      self.xmonad-contrib_0_18_1
-
-      self.xmonad-extras
-    ]))
-    haskell-language-server
-    cabal-install
-
     #
     # Installer testing
     #