diff --git a/home/jashton.nix b/home/jashton.nix
index b620813..7b16d76 100644
--- a/home/jashton.nix
+++ b/home/jashton.nix
@@ -116,14 +116,14 @@ in
 
     (pkgs.writeShellScriptBin "jrun" ''
       set -euo pipefail
-      if [ $# -lt 1 ]; then
-        echo "usage: jrun <package.MainClass> [args...]" >&2
+      if [ $# -lt 2 ]; then
+        echo "usage: jrun <folder> <package> <MainClass> [args...]" >&2
         exit 1
       fi
       ROOT="$(jroot)"
       cd "$ROOT"
       jbuild $1
-      MAIN="$1"; shift
+      MAIN="./bin/$2/$3"; shift
       java -cp "bin:lib/*" "$MAIN" "$@"
     '')