In override files, implementations can't be relative paths.
tree95d55e3a81e3507d71348a88e9655cdb8567d60c
-rwxr-xr-x 3032 0alias
-rw-r--r-- 1488 0alias.1
-rwxr-xr-x 5837 0launch
-rw-r--r-- 5219 0launch.1
-rwxr-xr-x 2106 0store
-rw-r--r-- 2838 0store.1
-rw-r--r-- 26536 COPYING
-rw-r--r-- 80 MANIFEST.in
-rw-r--r-- 2080 README
drwxr-xr-x - debian
-rwxr-xr-x 1372 makedist
-rw-r--r-- 67 setup.cfg
-rw-r--r-- 1023 setup.py
drwxr-xr-x - tests
drwxr-xr-x - zeroinstall