put stuff in a Makefile

Makefile

@@ -0,0 +1,5 @@
+all: dist/index.html
+
+dist/index.html: $(shell find src -type f -name '*.elm') elm.json
+	@mkdir -p dist
+	elm make src/Main.elm --output $@

modd.conf

@@ -1,5 +1,5 @@
 src/** {
-    prep: mkdir -p dist && elm make src/Main.elm --debug --output dist/index.html
+    prep: make all
 }
 
 dist/** {

shell.nix

@@ -18,6 +18,7 @@ stdenv.mkDerivation {
     elmPackages.elm-test
 
     # Build Stuff
+    gnumake
     modd
     devd
   ];