Hi,

'./pre-inst-env guix-build gobject-introspection' fails with the
following error:

  GICOMP gir/cairo-1.0.gir
Traceback (most recent call last):
  File "./g-ir-scanner", line 46, in <module>
    sys.exit(scanner_main(sys.argv))
  File "./giscanner/scannermain.py", line 413, in scanner_main
    ss = create_source_scanner(options, args)
  File "./giscanner/scannermain.py", line 335, in create_source_scanner
    ss.parse_files(filenames)
  File "./giscanner/sourcescanner.py", line 250, in parse_files
    self._parse(headers)
  File "./giscanner/sourcescanner.py", line 283, in _parse
    stdout=subprocess.PIPE)
  File "/nix/store/rvbri7f1j91nrblhw8xhp8ik3p89m5hh-python-2.7.3/lib/python2.7/subprocess.py", line 679, in __init__
    errread, errwrite)
  File "/nix/store/rvbri7f1j91nrblhw8xhp8ik3p89m5hh-python-2.7.3/lib/python2.7/subprocess.py", line 1249, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory
make[2]: *** [GLib-2.0.gir] Error 1
make[2]: Leaving directory `/tmp/nix-build-gobject-introspection-1.34.2.drv-12/gobject-introspection-1.34.2'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/tmp/nix-build-gobject-introspection-1.34.2.drv-12/gobject-introspection-1.34.2'
make: *** [all] Error 2

The problem isn't version-specific.  I tested several versions.  I also
tried to remove all Cairo-related things from 'Makefile.in', but it
didn't help.  My guess is that our GLib causes the problem, but I'm not
sure.

Here's a snippet from Nixpkgs:

   # Tests depend on cairo, which is undesirable (it pulls in lots of
   # other dependencies).
   configureFlags = "--disable-tests";

AFAICT, this flag is useless because the tests are disabled by
default.

Nikita