dev-ruby/charlock_holmes: avoid calling which

Closes: https://bugs.gentoo.org/940712
Signed-off-by: Hans de Graaff <graaff@gentoo.org>

dev-ruby/charlock_holmes/charlock_holmes-0.7.9.ebuild

@@ -36,6 +36,10 @@ all_ruby_prepare() {
 	# Avoid dependency on rake-compiler
 	sed -i -e '/rake-compiler/,$ s:^:#:' Rakefile || die
 
+	# Avoid using `which`, and we know make exists.
+	sed -e '/which make/,/^end/ s:^:#:' \
+		-i ext/charlock_holmes/extconf.rb || die
+
 	sed -e 's/git ls-files/find/' -i ${RUBY_FAKEGEM_GEMSPEC} || die
 }