Before: ```bash lockfile_command=`command -v /nix/store/8l572fp5svwp2x1izz2avji8l0ysxkq4-procmail-3.24/bin/lockfile` lockfile() { if [ -n "lockfile" ] ; then lockfile -1 -l 10 -s 3 "$screensaver_file".lock ``` After: ```bash lockfile_command=`command -v /nix/store/4ka6z06bvxbcz98m0wy5m1m04f8ppkgw-procmail-3.24/bin/lockfile` lockfile() { if [ -n "$lockfile_command" ] ; then $lockfile_command -1 -l 10 -s 3 "$screensaver_file".lock ``` Fixes #304308