This is version two of the patch series, removing a 'pk' that
I added for debugging, and also fixing 'wrap-script' and 'wrap-program'.
To fix 'wrap-script' and 'wrap-program', I added a required 'inputs' argument.
All callers have been adjusted to pass it.

Perhaps 'patch-shebang' can be fixed and needs to be fixed, but I don't
have investigated that closely yet.  ('patch-shebangs' (with a #\s) works
properly IIUC).

Greetings,
Maxime.