Index: head/science/py-chempy/Makefile
===================================================================
--- head/science/py-chempy/Makefile	(revision 480234)
+++ head/science/py-chempy/Makefile	(revision 480235)
@@ -1,32 +1,46 @@
 # $FreeBSD$
 
 PORTNAME=	chempy
-DISTVERSION=	0.7.2
+DISTVERSION=	0.7.3
 CATEGORIES=	science python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Package useful for solving problems in chemistry
 
 LICENSE=	BSD3CLAUSE
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 BUILD_DEPENDS=	${PYTHON_PKGNAMEPREFIX}bokeh>=0.11.1:www/py-bokeh@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}matplotlib>0:math/py-matplotlib@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}PuLP>=1.6.8:math/py-PuLP@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}pyneqsys>=0.5.4:math/py-pyneqsys@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}pyodesys>=0.12.3:math/py-pyodesys@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}pyparsing>=2.0.3:devel/py-pyparsing@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}quantities>=0.12.1:science/py-quantities@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}scipy>=1.0.1:science/py-scipy@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}sym>=0.3.4:math/py-sym@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}sympy>=1.1.1:math/py-sympy@${PY_FLAVOR} \
 		${NUMPY}
 RUN_DEPENDS:=	${BUILD_DEPENDS}
 
+
 USES=		python
 USE_PYTHON=	distutils autoplist
 NO_ARCH=	yes
+
+OPTIONS_DEFINE=		EXTRAS
+OPTIONS_DEFAULT=	EXTRAS
+
+EXTRAS_DESC=		Install optional dependencies for additional functionality
+EXTRAS_RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}appdirs>0:devel/py-appdirs@${PY_FLAVOR} \
+			${PYTHON_PKGNAMEPREFIX}pycodeexport>=0.1.2:devel/py-pycodeexport@${PY_FLAVOR} \
+			${PYTHON_PKGNAMEPREFIX}pycompilation>=0.4.3:devel/py-pycompilation@${PY_FLAVOR} \
+			${PYTHON_PKGNAMEPREFIX}pygslodeiv2>=0.9.1:math/py-pygslodeiv2@${PY_FLAVOR} \
+			${PYTHON_PKGNAMEPREFIX}pyodeint>=0.10.1:math/py-pyodeint@${PY_FLAVOR}
+
+do-test:
+	@cd ${WRKSRC} && pytest -rs --pyargs chempy
 
 .include <bsd.port.mk>
Index: head/science/py-chempy/distinfo
===================================================================
--- head/science/py-chempy/distinfo	(revision 480234)
+++ head/science/py-chempy/distinfo	(revision 480235)
@@ -1,3 +1,3 @@
-TIMESTAMP = 1537215248
-SHA256 (chempy-0.7.2.tar.gz) = 1dd9bc1d2a69c1e61c5b042d73d9bf00804b3d60f46510fbca878c5ead2d62f0
-SIZE (chempy-0.7.2.tar.gz) = 162100
+TIMESTAMP = 1537515502
+SHA256 (chempy-0.7.3.tar.gz) = 002a6a78914f26d4a10c7834f811aa26a435b2287ab26804bed8b5aa69e5f97f
+SIZE (chempy-0.7.3.tar.gz) = 162098