[minify] some work on getting zephyr to work

Currently, parcel problems.

package.json

@@ -49,9 +49,10 @@
     },
     "devDependencies": {
         "@babel/core": "^7.15.0",
+        "@babel/preset-env": "^7.15.6",
         "@babel/preset-react": "^7.12.7",
         "@getgauge/cli": "^1.4.0",
-        "parcel": "^2.0.0-beta.2",
+        "parcel": "^2.0.0-rc.0",
         "react-testing-library": "^8.0.1",
         "sass": "^1.35.2",
         "serve": "^12.0.0",

shell.nix

@@ -35,8 +35,6 @@ let
 
   '';
 
-
-
   build-watch = pkgs.writeShellScriptBin "build-watch" ''
     #!/usr/bin/env bash
     set -e
@@ -45,6 +43,15 @@ let
     spago build -w --then browserify
   '';
 
+  build-zephyr = pkgs.writeShellScriptBin "build-zephyr" ''
+    #!/usr/bin/env bash
+    set -e
+
+    spago build --purs-args '--codegen corefn,js'
+    zephyr -f Main.main
+    yarn parcel build dist/index.html --public-url '.' --no-source-maps
+  '';
+
   browserify = pkgs.writeShellScriptBin "browserify" ''
     #!/usr/bin/env bash
     set -e
@@ -82,10 +89,12 @@ pkgs.mkShell {
     easy-ps.purs-0_14_4
     easy-ps.psc-package
     easy-ps.dhall-json-simple
+    easy-ps.zephyr
     browserify
     build-css
     build-purs
     build-watch
+    build-zephyr
     build
     minify-bundle
     pkgs.minify