Fix flake

Author: ProggerX

flake.nix

@@ -16,9 +16,11 @@
           returnShellEnv = isShell;
           modifier =
             drv:
-            pkgs.haskell.lib.addBuildTools drv [
-              pkgs.mkdocs
-            ];
+            pkgs.haskell.lib.addBuildTools drv (with pkgs; [
+              mkdocs
+              haskell-language-server
+              cabal-install
+            ]);
         };
     in
     flake-parts.lib.mkFlake { inherit inputs; } {

src/Lapse/Lambda.hs

@@ -11,7 +11,11 @@ import Lapse.Operators (lset)
 import Lapse.Scopes (getValueM)
 import Lapse.Types (Func, LapseM, Scopes, Value (..))
 
-data UnList m = Proper [Value] | Improper ([Value], Value) | Single Value deriving (Show)
+data UnList m
+  = Proper [Value]
+  | Improper ([Value], Value)
+  | Single Value
+  deriving (Show)
 
 unList :: Value -> UnList m
 unList Nil = Proper []

src/Lapse/Types.hs

@@ -92,7 +92,11 @@ surround s = "(" ++ s ++ ")"
 
 type LapseM = StateT Scopes (StateT Int IO)
 
-data UnList = Proper [Value] | Improper ([Value], Value) | Single Value deriving (Show)
+data UnList
+  = Proper [Value]
+  | Improper ([Value], Value)
+  | Single Value
+  deriving (Show)
 
 unList :: Value -> UnList
 unList Nil = Proper []