euse from gentoolkit 0.20 fails when used with the make.profile from 2005.0 Line 157 has parent="$(grep -v '(^#|^ *$)' .... Here, grep should be "egrep" since regular grep does not handle (, ), and | without escaping backslashes.
Created attachment 55143 [details, diff] Patch to fix euse to use egrep instead of grep
*** This bug has been marked as a duplicate of 75525 ***