Index: science/ALPSCore/Makefile
===================================================================
--- science/ALPSCore/Makefile
+++ science/ALPSCore/Makefile
@@ -18,7 +18,7 @@
 		libhdf5.so:science/hdf5 \
 		libsz.so:science/szip
 
-USES=		cmake eigen:3
+USES=		cmake compiler:c++11-lang eigen:3
 USE_GITHUB=	yes
 USE_LDCONFIG=	yes
 TEST_TARGET=	test # 2 to 3 tests fail: https://github.com/ALPSCore/ALPSCore/issues/388