diff --git a/bin/ruby-local-exec b/bin/ruby-local-exec
index b1b5a5fa..a2064370 100755
--- a/bin/ruby-local-exec
+++ b/bin/ruby-local-exec
@@ -12,9 +12,5 @@
 # `cd` into the project first.
 
 set -e
-
-if [ -z "$RBENV_DIR" ]; then
-  export RBENV_DIR="${1%/*}"
-fi
-
+export RBENV_DIR="${1%/*}"
 exec ruby "$@"