diff --git a/math/py-gmpy2-devel/Makefile b/math/py-gmpy2-devel/Makefile
index b08e25f0fc44..131894b3c7aa 100644
--- a/math/py-gmpy2-devel/Makefile
+++ b/math/py-gmpy2-devel/Makefile
@@ -1,43 +1,44 @@
 # Created by: Yuri Victorovich <yuri@rawbw.com>
 
 PORTNAME=	gmpy2
 DISTVERSIONPREFIX=	gmpy2-
 DISTVERSION=	2.1.0b5
 PORTREVISION=	1
 CATEGORIES=	math python
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 PKGNAMESUFFIX=	-devel
 
 MAINTAINER=	thierry@FreeBSD.org
 COMMENT=	GMP, MPFR, and MPC interface to Python - devel version
 
-LICENSE=	GPLv3
+LICENSE=	LGPL3+
+LICENSE_FILE=	${WRKSRC}/COPYING.LESSER
 
 LIB_DEPENDS=	libgmp.so:math/gmp \
 		libmpc.so:math/mpc \
 		libmpfr.so:math/mpfr
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	aleaxit
 GH_PROJECT=	gmpy
 
 USES=		localbase python:3.7-3.9
 USE_PYTHON=	distutils
 
 CONFLICTS=	${PYTHON_PKGNAMEPREFIX}gmpy2-2.0*
 
 OPTIONS_DEFINE=		DOCS
 DOCS_BUILD_DEPENDS=	${PYTHON_PKGNAMEPREFIX}sphinx>=0,1:textproc/py-sphinx@${PY_FLAVOR}
 DOCS_USES=		gmake
 PORTDOCS=		*
 
 PLIST_SUB=	VER=${DISTVERSION}
 
 do-build-DOCS-on:
-	(cd ${WRKSRC}/docs && ${GMAKE} html)
+	(cd ${WRKSRC}/docs && ${GMAKE} SPHINXBUILD=sphinx-build-${PYTHON_VER} html)
 
-post-build-DOCS-on:
-	${MKDIR} ${STAGEDIR}${DOCSDIR}
+post-install-DOCS-on:
+	@${MKDIR} ${STAGEDIR}${DOCSDIR}
 	${CP} -R ${WRKSRC}/docs/_build/html/* ${STAGEDIR}${DOCSDIR}
 
 .include <bsd.port.mk>