--- b/audio/lv2/Makefile	Mon Jan 21 09:30:32 2019 +0000
+++ b/audio/lv2/Makefile	Mon Jan 21 04:45:33 2019 -0500
@@ -21,7 +21,7 @@ 
 
 CONFLICTS_INSTALL=	lv2core
 
-USES=		python shebangfix tar:bzip2 waf
+USES=		python:-3.6 shebangfix tar:bzip2 waf
 SHEBANG_FILES=	lv2specgen/lv2specgen.py
 
 OPTIONS_DEFINE=	DOCS DOXYGEN EXAMPLES