diff --git a/mk b/mk
index a5baa0f8..37cac28e 100755
--- a/mk
+++ b/mk
@@ -25,7 +25,7 @@ const rm = (x) => {
 };
 const pj = JSON.parse(rf('package.json'));
 // v:version string - "x.y.z" where z is the number of commits since the beginning of the project
-const v = `${pj.version.replace(/\.0$/, '')}.${sh('git rev-list --count HEAD')}`;
+const v = "@version@";
 const isDyalogBuild = /^dyalog/.test(pj.name);
 const tasks = { };
 
@@ -36,8 +36,8 @@ const b = (f) => {
   const vi = {
     versionInfo: {
       version: v,
-      date: sh('git show -s HEAD --pretty=format:%ci'),
-      rev: sh('git rev-parse HEAD'),
+      date: 'unknown',
+      rev: 'nixpkgs',
     },
   };
   wf('_/version.js', `D=${JSON.stringify(vi)}`);
@@ -50,6 +50,9 @@ const incl = new RegExp('^$'
   + '|^/style($|/(fonts|img)|.*\\.css$)');
 const pkg = (x, y, f) => {
   rq('electron-packager')({
+    asar: true,
+    electronZipDir: "local-cache",
+    electronVersion: "@electron_version@",
     dir: '.',
     platform: x,
     arch: y,