Set up emacs for interactive GHOTL eval

demo.nix

@@ -4,5 +4,5 @@ let
   ghotl-repl = (import ./ghotl-repl.nix { inherit pkgs; });
 in mkShell {
   name = "ghotl";
-  buildInputs = [ emacs ghotl ghotl-repl ];
+  buildInputs = [ (import ./emacs.nix) ghotl ghotl-repl ];
 }

emacs.nix

@@ -11,15 +11,17 @@ let
         :config (evil-mode))
       (use-package haskell-mode
         :bind ("C-c C-c" . haskell-compile))
-      ;(use-package ghc)
       (global-whitespace-mode)
       (setq whitespace-style '(tab-mark face trailing tabs))
+      (defun ghotl-eval () "" ()
+        (shell-command-on-region (point-min) (point-max) "ghotl" "*GHOTL Output*")
+        (display-buffer "*GHOTL Output*"))
+      (global-set-key (kbd "C-c C-e") (lambda () (interactive) (ghotl-eval)))
     '';
   };
   emacs = pkgs.emacsWithPackages (ps: with ps; [
     evil markdown-mode
     haskell-mode
-    ghc-mod
     nix-mode
     magit
     use-package