diff --git a/math/py-dgl/Makefile b/math/py-dgl/Makefile
index 29ca98e069fe..61fda08b370f 100644
--- a/math/py-dgl/Makefile
+++ b/math/py-dgl/Makefile
@@ -1,75 +1,75 @@
 PORTNAME=	dgl
 DISTVERSION=	1.1.0
-CATEGORIES=	math python
+CATEGORIES=	math python # machine-learning
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Deep Graph Library
 WWW=		https://www.dgl.ai/
 
 LICENSE=	BSD3CLAUSE
 
 BUILD_DEPENDS=	${PY_SETUPTOOLS} \
 		${PYTHON_PKGNAMEPREFIX}wheel>0:devel/py-wheel@${PY_FLAVOR} \
 		${BACKEND_DEPENDS}
 LIB_DEPENDS=	libdgl.so:math/dgl
 RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}networkx>=2.2:math/py-networkx@${PY_FLAVOR} \
 		${PYNUMPY} \
 		${PYTHON_PKGNAMEPREFIX}psutil>=5.8.0:sysutils/py-psutil@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}requests>=2.19.0:www/py-requests@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}scipy>=1.1.0:science/py-scipy@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}tqdm>0:misc/py-tqdm@${PY_FLAVOR} \
 		${BACKEND_DEPENDS}
 
 USES=		python:3.7+ localbase
 USE_PYTHON=	distutils cython autoplist
 
 WRKSRC_SUBDIR=	python
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	dmlc
 
 MAKE_ENV=	DGL_LIBRARY_PATH=${LOCALBASE}/lib
 
-POST_PLIST=	rm-tests-from-plist
+POST_PLIST=	fix-plist
 
 OPTIONS_RADIO=			BACKEND
 OPTIONS_RADIO_BACKEND=		PYTORCH TENSORFLOW MXNET
 OPTIONS_DEFAULT=		PYTORCH
 
 PYTORCH_DESC=			Use PyTorch backend
 PYTORCH_VARS=			BACKEND_DEPENDS=${PYTHON_PKGNAMEPREFIX}pytorch>0:misc/py-pytorch@${PY_FLAVOR}
 PYTORCH_MAKE_ENV=		DGLBACKEND=pytorch
 
 TENSORFLOW_DESC=		Use TensorFlow backend
 TENSORFLOW_VARS=		BACKEND_DEPENDS=${PYTHON_PKGNAMEPREFIX}tensorflow>0:science/py-tensorflow@${PY_FLAVOR}
 TENSORFLOW_MAKE_ENV=		DGLBACKEND=tensorflow
 
 MXNET_DESC=			Use MXNET backend
 MXNET_VARS=			BACKEND_DEPENDS=${PYTHON_PKGNAMEPREFIX}mxnet>0:misc/py-mxnet@${PY_FLAVOR}
 MXNET_MAKE_ENV=			DGLBACKEND=mxnet
 
 post-install:
 	# workaround for https://github.com/dmlc/dgl/issues/5665
 	@${RM} ${STAGEDIR}${PREFIX}/dgl/libdgl.so
 	# remove empty dirs
 	@${RMDIR} \
 		${STAGEDIR}${PREFIX}/dgl/tensoradapter/pytorch \
 		${STAGEDIR}${PREFIX}/dgl/tensoradapter \
 		${STAGEDIR}${PREFIX}/dgl/dgl_sparse \
 		${STAGEDIR}${PREFIX}/dgl
 	# strip binaries
 	@${STRIP_CMD} ${STAGEDIR}${PYTHONPREFIX_SITELIBDIR}/dgl/_ffi/_cy3/core${PYTHON_EXT_SUFFIX}.so
 
-rm-tests-from-plist:
+fix-plist:
 	# workaround for https://github.com/dmlc/dgl/issues/5665
 	@${REINPLACE_CMD} ' \
 		/dgl\/libdgl.so/d ; \
 		' ${TMPPLIST}
 	# remove empty dirs
 	@${REINPLACE_CMD} ' \
 		/dgl\/tensoradapter\/pytorch/d ; \
 		/dgl\/dgl_sparse/d ; \
 		' ${TMPPLIST}
 
 .include <bsd.port.mk>
diff --git a/math/py-dgl/pkg-message b/math/py-dgl/pkg-message
new file mode 100644
index 000000000000..9c9e447aa1f9
--- /dev/null
+++ b/math/py-dgl/pkg-message
@@ -0,0 +1,12 @@
+[
+{ type: install
+  message: <<EOM
+You installed DGL: Deep Graph Library.
+
+It expects the DGLBACKEND environment variable
+during runtime that matches the BACKEND option chosen
+during build.
+
+EOM
+}
+]