Unable to convert definitions to bst format?

Hello,

First error,

richardipsum@violaine:~/definitions$ ./convert
bash: ./convert: /usr/bin/bash: bad interpreter: No such file or directory

Fix,

richardipsum@violaine:~/definitions$ sed -i '1s/usr\///' convert

Second error,

richardipsum@violaine:~/definitions$ ./convert
[--:--:--] START: Extracting base-system-x86_64-generic.yml from definitions at /home/richardipsum/definitions/old-definitions-morph-format
[00:00:00] FAIL: Extracting base-system-x86_64-generic.yml from definitions at /home/richardipsum/definitions/old-definitions-morph-format

  Error extracting target yml with YBD: [Errno 2] No such file or directory: '/home/richardipsum/definitions/old-definitions-morph-format'

richardipsum@violaine:~/definitions$ ./convert
[--:--:--] START: Extracting base-system-x86_64-generic.yml from definitions at /home/richardipsum/definitions/old-definitions-morph-format
[00:00:00] FAIL: Extracting base-system-x86_64-generic.yml from definitions at /home/richardipsum/definitions/old-definitions-morph-format

  Error extracting target yml with YBD: [Errno 2] No such file or directory: '/home/richardipsum/definitions/old-definitions-morph-format'

Looks like something is missing? Or am I just being dumb? I'd like to try building some things with bst, this seemed like the obvious place to start, maybe I was wrong though?