diff --git a/games-arcade/performous/performous-1.0.ebuild b/games-arcade/performous/performous-1.0.ebuild
index 9fa6cdf80daca..fbdaa56aeedf7 100644
--- a/games-arcade/performous/performous-1.0.ebuild
+++ b/games-arcade/performous/performous-1.0.ebuild
@@ -66,9 +66,11 @@ src_prepare() {
 	sed -i \
 		-e "s:@GENTOO_BINDIR@:${GAMES_BINDIR}:" \
 		-e '/ Z /s/ Z / ZLIB /' \
+		-e 's/Z_FOUND/ZLIB_FOUND/g' \
+		-e 's/Z_LIBRARIES/ZLIB_LIBRARIES/g' \
 		-e 's/Jpeg/JPEG/' \
 		-e 's/Png/PNG/' \
-		game/CMakeLists.txt || die
+		{game,tools}/CMakeLists.txt || die
 
 	strip-linguas -u lang
 }
diff --git a/games-arcade/performous/performous-1.1.ebuild b/games-arcade/performous/performous-1.1.ebuild
index 9d54a662e18e6..1fcd585c42afb 100644
--- a/games-arcade/performous/performous-1.1.ebuild
+++ b/games-arcade/performous/performous-1.1.ebuild
@@ -63,10 +63,12 @@ src_prepare() {
 		"${FILESDIR}"/${P}-linguas.patch
 	sed -i \
 		-e "s:@GENTOO_BINDIR@:${GAMES_BINDIR}:" \
-		-e '/ Z /s/ Z / ZLIB /' \
+		-e '/ Z /s/ Z/ ZLIB/g' \
+		-e 's/Z_FOUND/ZLIB_FOUND/g' \
+		-e 's/Z_LIBRARIES/ZLIB_LIBRARIES/g' \
 		-e 's/Jpeg/JPEG/' \
 		-e 's/Png/PNG/' \
-		game/CMakeLists.txt || die
+		{game,tools}/CMakeLists.txt || die
 
 	strip-linguas -u lang
 }