Index: security/klee/Makefile
===================================================================
--- security/klee/Makefile
+++ security/klee/Makefile
@@ -16,7 +16,7 @@
 # Should be a LIB_DEPEND, but hard to express in a generic manner
 RUN_DEPENDS=	llvm-config${LLVM_DEFAULT}:devel/llvm${LLVM_DEFAULT}
 
-USES=		cmake localbase pkgconfig python:run shebangfix
+USES=		cmake localbase pkgconfig python:3.5+,run shebangfix
 USE_GITHUB=	yes
 SHEBANG_FILES=	tools/klee-stats/klee-stats tools/ktest-tool/ktest-tool
 USE_LDCONFIG=	yes