diff --git a/functions/z.zsh b/functions/z.zsh
index 8c14274..85a3704 100644
--- a/functions/z.zsh
+++ b/functions/z.zsh
@@ -95,10 +95,10 @@ _z() {
         ' 2>/dev/null >| "$tempfile"
         # do our best to avoid clobbering the datafile in a race condition.
         if [ $? -ne 0 -a -f "$datafile" ]; then
-            env rm -f "$tempfile"
+            command rm -f "$tempfile"
         else
-            [ "$_Z_OWNER" ] && chown $_Z_OWNER:"$(id -ng $_Z_OWNER)" "$tempfile"
-            env mv -f "$tempfile" "$datafile" || env rm -f "$tempfile"
+            [ "$_Z_OWNER" ] && command chown $_Z_OWNER:"$(id -ng $_Z_OWNER)" "$tempfile"
+            command mv -f "$tempfile" "$datafile" || command rm -f "$tempfile"
         fi
 
     # tab completion