* guix-package.in (guix-package)[find-package]: Return the correct NAME and SUB-DRV when NAME contains #\:. * tests/guix-package.sh (profile): Add test.
* guix-package.in, tests/guix-package.sh: New files. * configure.ac: Output `guix-package'. * Makefile.am (TESTS): Add `tests/guix-package.sh'. (bin_SCRIPTS): Add `guix-package'.