Please find attached a patch for libpeas.

This package, up to now, is the only one experiencing some
side-effects from the gobject-introspection patch that we adopted from
nix and which installs the full path name of shared libraries in
.typelib and .gir files.

The side-effect here is that some tests fail because:

* they are executed before installation (solvable by swapping 'check
and 'install phases) and

* because it makes use of libtool convenience libraries (libraries
which are only intermediate steps and are not installed). This is
implemented by specifying a fake installation directory called
"/nowhere" which, of course, does not exists. This is the error
message:

/tmp/nix-build-libpeas-1.12.1.drv-0/libpeas-1.12.1/tests/libpeas/.libs/extension-c:11955):
libpeas-ERROR **: Unhandled warning: (null): Failed to load shared
library '/nowhere/libintrospection-1.0.so.0' referenced by the
typelib: /nowhere/libintrospection-1.0.so.0: cannot open shared object
file: No such file or directory

Unless someone knows how to solve this problem, I suggest to disable the tests.

Regards,
Fede