diff --git a/packages/typescript/4.2.3/run b/packages/typescript/4.2.3/run
index 1d26f3f..5a8c60e 100644
--- a/packages/typescript/4.2.3/run
+++ b/packages/typescript/4.2.3/run
@@ -2,7 +2,7 @@
 
 # Put instructions to run the runtime
 
-CODE=$(sed 's/ts$/js/' <<<"$1")
+CODE=$1.js
 shift
 
 node $CODE "$@"