inside the gtk-engines2.eclass, wherever the eclass is sourced, 'pkg-config gtk+-2.0 --modversion' is run. Produces errors on a system where pkg-config is not present. Calculating depclean dependencies |/usr/sbin/ebuild.sh: line 1: pkg-config: command not found //usr/sbin/ebuild.sh: line 1: pkg-config: command not found ... done!
redirect stderr to /dev/null
fixed as per genone's suggestions.