diff --git a/build/justfile b/build/justfile
index 0b9e7de..9ce9aa3 100644
--- a/build/justfile
+++ b/build/justfile
@@ -1,6 +1,4 @@
 build:
-    # compile the janet into an image
-    # janet -c src/ludus.janet build/ludus.jimage
     # the complex emscripten invocation
     # note we have the stack size set to 1024*1024 (1 MB)
     emcc \
diff --git a/justfile b/justfile
index e5a866f..df3b806 100644
--- a/justfile
+++ b/justfile
@@ -3,6 +3,7 @@ repl:
 	kitten @ launch --type=os-window --allow-remote-control --cwd=current --title=hx_repl:ludus --keep-focus
 	kitten @ send-text -m "title:hx_repl:ludus" "janet -s\n"
 
+# restart the repl server
 restart:
 	kitten @ send-text -m "title:hx_repl:ludus" "\04"
 	kitten @ send-text -m "title:hx_repl:ludus" "janet -s\n"
@@ -17,5 +18,14 @@ doc:
 
 # publish to npm (did you build things first?)
 publish:
+	just build
 	npm version patch
 	npm publish
+
+# build the ludus jimage
+build:
+	rm build/out.mjs
+	rm build/out.wasm
+	rm build/ludus.jimage
+	janet -c src/ludus.janet build/ludus.jimage
+	cd build && just build