Index: head/finance/electrum/Makefile
===================================================================
--- head/finance/electrum/Makefile	(revision 453871)
+++ head/finance/electrum/Makefile	(revision 453872)
@@ -1,39 +1,46 @@
 # Created by: Neil Booth
 # $FreeBSD$
 
 PORTNAME=	electrum
 PORTVERSION=	3.0.1
 CATEGORIES=	finance python
 MASTER_SITES=	https://download.electrum.org/${PORTVERSION}/ \
 		http://download.electrum.org/${PORTVERSION}/
 DISTNAME=	Electrum-${PORTVERSION}
 
 MAINTAINER=	ehaupt@FreeBSD.org
 COMMENT=	Easy to use Bitcoin client
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENCE
 
 RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}dnspython>0:dns/py3-dnspython \
 		${PYTHON_PKGNAMEPREFIX}ecdsa>0:security/py3-ecdsa \
 		${PYTHON_PKGNAMEPREFIX}httplib2>=0:www/py3-httplib2 \
 		${PYTHON_PKGNAMEPREFIX}jsonrpclib-pelix>0:devel/py-jsonrpclib-pelix \
 		${PYTHON_PKGNAMEPREFIX}pbkdf2>=1.3:security/py3-pbkdf2 \
 		${PYTHON_PKGNAMEPREFIX}protobuf>=2.6.0:devel/py3-protobuf \
 		${PYTHON_PKGNAMEPREFIX}pyaes>0:security/py3-pyaes \
 		${PYTHON_PKGNAMEPREFIX}pysocks>=0:net/py3-pysocks \
 		${PYTHON_PKGNAMEPREFIX}qrcode>=5.1:textproc/py3-qrcode \
 		${PYTHON_PKGNAMEPREFIX}requests>=2.4.3:www/py3-requests
 
 CONFLICTS_INSTALL=	electrum2-*
 
 USES=		desktop-file-utils pyqt:5 python:3
 USE_PYQT=	gui_run sip widgets
 USE_PYTHON=	autoplist distutils
 PYDISTUTILS_PKGNAME=	Electrum
 NO_ARCH=	yes
 
+.include <bsd.port.pre.mk>
+
+.if defined(PACKAGE_BUILDING) && !defined(PACKAGE_BUILDING_FLAVORS) && \
+	${PYTHON_VER} != ${PYTHON_DEFAULT}
+IGNORE=	you have python ${PYTHON_DEFAULT} set as the default, and this needs ${PYTHON_VER}
+.endif
+
 post-patch:
 	@${REINPLACE_CMD} -e 's,%%PREFIX%%,${PREFIX},g' ${WRKSRC}/setup.py
 
-.include <bsd.port.mk>
+.include <bsd.port.post.mk>