gopass maintains a ~/.cache/gopass/gpg-binary.loc file
which stores an absolute path to the gpg executable,
overriding (and ignoring) the environment $PATH.
This creates a situation where gopass will work for a period of time
after install, but after gpg is upgraded and a 'nix-store --gc' is
performed, the cached gpg path will throw an error.
A gopass maintainer has declared this a wont-fix in
https://github.com/gopasspw/gopass/issues/1662
As a workaround, add a --run clause in the wrapper script
that removes this cache file.
Once (if) upstream fixes this issue, this cruft can be removed.
Signed-off-by: Sirio Balmelli <sirio@b-ad.ch>