Simon Streit schreef op di 31-08-2021 om 22:49 [+0200]:

> Now to beets. [...]
> Along the way, I noticed -- even with v1.4.9 -- beets would
> not find the fpcalc. Fpcalc is part of chromaprint and while this
> package is an optional dependency, I put it into propagated-inputs and
> solved this issue somehow.

beets is probably searching for 'fpcalc' in $PATH, instead of using a string
like /gnu/store/.../bin/fpcalc.  This can usually be resolved with substitute*,
to turn something like 'system("fpcalc --stuff")' into
'system("/gnu/store/.../bin/fpcalc --stuff")' (that's for C code, the python
equivalent might be a little different).

Greetings,
Maxime.