diff --git a/home/jashton.nix b/home/jashton.nix
index ab47385..342d73b 100644
--- a/home/jashton.nix
+++ b/home/jashton.nix
@@ -121,14 +121,15 @@ in
 
     (pkgs.writeShellScriptBin "jrun" ''
       set -euo pipefail
-      if [ $# -lt 2 ]; then
+      if [ $# -lt 3 ]; then
         echo "usage: jrun <folder> <package> <MainClass> [args...]" >&2
         exit 1
       fi
       ROOT="$(jroot)"
       cd "$ROOT"
-      jbuild $1
-      MAIN="./bin/$2/$3"; shift
+      jbuild "$1"
+      MAIN="$2.$3"
+      shift 3
       java -cp "bin:lib/*" "$MAIN" "$@"
     '')