diff --git a/www/zope-archetypes/Makefile b/www/zope-archetypes/Makefile
index a03cd9ba0dfe..ddcddeb85a22 100644
--- a/www/zope-archetypes/Makefile
+++ b/www/zope-archetypes/Makefile
@@ -29,6 +29,8 @@ USE_ZOPE=	yes
 USE_PYTHON=	yes
 PLIST=	${WRKDIR}/pkg-plist
 
+CONFLICTS=	plone-[0-9]*
+
 do-build:
 	-@${PYTHON_CMD} ${PYTHON_LIBDIR}/compileall.py ${WRKSRC}
 
diff --git a/www/zope-btreefolder2/Makefile b/www/zope-btreefolder2/Makefile
index b334dc8e1a06..01272c8c737e 100644
--- a/www/zope-btreefolder2/Makefile
+++ b/www/zope-btreefolder2/Makefile
@@ -22,6 +22,8 @@ DIST_SUBDIR=	zope
 
 WRKSRC=		${WRKDIR}/BTreeFolder2
 
+CONFLICTS=	plone-[0-9]*
+
 do-build:
 	@${PYTHON_CMD} ${PYTHON_LIBDIR}/compileall.py  ${WRKSRC}/tests
 	@${PYTHON_CMD} ${PYTHON_LIBDIR}/compileall.py -l ${WRKSRC}
diff --git a/www/zope-cmf/Makefile b/www/zope-cmf/Makefile
index 489455f50182..fa443bf01147 100644
--- a/www/zope-cmf/Makefile
+++ b/www/zope-cmf/Makefile
@@ -18,6 +18,8 @@ USE_PYTHON=	yes
 USE_ZOPE=	yes
 DIST_SUBDIR=	zope
 
+CONFLICTS=	plone-[0-9]*
+
 do-build:
 	-@${PYTHON_CMD} ${PYTHON_LIBDIR}/compileall.py ${WRKSRC}/CMF*
 
diff --git a/www/zope-cmfactionicons/Makefile b/www/zope-cmfactionicons/Makefile
index 880eb9249fac..78e2a8a90d5f 100644
--- a/www/zope-cmfactionicons/Makefile
+++ b/www/zope-cmfactionicons/Makefile
@@ -26,6 +26,8 @@ ZOPEPRODUCTNAME=	CMFActionIcons
 PLIST=		${WRKDIR}/pkg-plist
 WRKSRC=		${WRKDIR}/${ZOPEPRODUCTNAME}-${PORTVERSION}/${ZOPEPRODUCTNAME}
 
+CONFLICTS=	plone-[0-9]*
+
 do-build:
 	@${PYTHON_CMD} ${PYTHON_LIBDIR}/compileall.py ${WRKSRC}/
 
diff --git a/www/zope-cmfformcontroller/Makefile b/www/zope-cmfformcontroller/Makefile
index 934e7cb0a560..8622c8f8044f 100644
--- a/www/zope-cmfformcontroller/Makefile
+++ b/www/zope-cmfformcontroller/Makefile
@@ -28,6 +28,8 @@ ZOPEPRODUCTNAME=	CMFFormController
 PLIST=	${WRKDIR}/pkg-plist
 WRKSRC=	${WRKDIR}/${ZOPEPRODUCTNAME}
 
+CONFLICTS=	plone-[0-9]*
+
 do-build:
 	@${PYTHON_CMD} ${PYTHON_LIBDIR}/compileall.py ${WRKSRC}
 
diff --git a/www/zope-cmfquickinstaller/Makefile b/www/zope-cmfquickinstaller/Makefile
index 060d130a9397..484792d83a78 100644
--- a/www/zope-cmfquickinstaller/Makefile
+++ b/www/zope-cmfquickinstaller/Makefile
@@ -26,6 +26,8 @@ DIST_SUBDIR=	zope
 
 WRKSRC=		${WRKDIR}/CMFQuickInstallerTool
 
+CONFLICTS=	plone-[0-9]*
+
 do-build:
 	@${PYTHON_CMD} ${PYTHON_LIBDIR}/compileall.py ${WRKSRC}/interfaces/
 	@${PYTHON_CMD} ${PYTHON_LIBDIR}/compileall.py -l ${WRKSRC}
diff --git a/www/zope-generator/Makefile b/www/zope-generator/Makefile
index 75d6d142575f..7c072c9bd67f 100644
--- a/www/zope-generator/Makefile
+++ b/www/zope-generator/Makefile
@@ -23,6 +23,8 @@ DIST_SUBDIR=	zope
 WRKSRC=	${WRKDIR}/${PORTNAME}
 PLIST=	${WRKDIR}/pkg-plist
 
+CONFLICTS=	plone-[0-9]*
+
 do-build:
 	-@${PYTHON_CMD} ${PYTHON_LIBDIR}/compileall.py ${WRKSRC}
 
diff --git a/www/zope-groupuserfolder/Makefile b/www/zope-groupuserfolder/Makefile
index 1df4156e0d3a..97a762cdcbc4 100644
--- a/www/zope-groupuserfolder/Makefile
+++ b/www/zope-groupuserfolder/Makefile
@@ -28,6 +28,8 @@ WRKSRC=		${WRKDIR}/GroupUserFolder
 
 PRODUCTNAME=	GroupUserFolder
 
+CONFLICTS=	plone-[0-9]*
+
 do-build:
 	-@${PYTHON_CMD} ${PYTHON_LIBDIR}/compileall.py ${WRKSRC}/
 
diff --git a/www/zope-kupu/Makefile b/www/zope-kupu/Makefile
index 2a7aaf3260c8..cebc4736dec6 100644
--- a/www/zope-kupu/Makefile
+++ b/www/zope-kupu/Makefile
@@ -22,6 +22,8 @@ ZOPEPRODUCTNAME=	kupu
 
 WRKSRC=		${WRKDIR}/${ZOPEPRODUCTNAME}
 
+CONFLICTS=	plone-[0-9]*
+
 do-build:
 	-@${PYTHON_CMD} ${PYTHON_LIBDIR}/compileall.py ${WRKSRC}
 
diff --git a/www/zope-mimetypesregistry/Makefile b/www/zope-mimetypesregistry/Makefile
index 73bb2ccaea1d..b73768563a16 100644
--- a/www/zope-mimetypesregistry/Makefile
+++ b/www/zope-mimetypesregistry/Makefile
@@ -27,6 +27,8 @@ ZOPEPRODUCTNAME=	MimetypesRegistry
 WRKSRC=	${WRKDIR}/${ZOPEPRODUCTNAME}
 PLIST=	${WRKDIR}/pkg-plist
 
+CONFLICTS=	plone-[0-9]*
+
 do-build:
 	-@${PYTHON_CMD} ${PYTHON_LIBDIR}/compileall.py ${WRKSRC}
 
diff --git a/www/zope-placelesstranslationservice/Makefile b/www/zope-placelesstranslationservice/Makefile
index bcee14798741..bcc65fd6ab22 100644
--- a/www/zope-placelesstranslationservice/Makefile
+++ b/www/zope-placelesstranslationservice/Makefile
@@ -25,6 +25,8 @@ ZOPEPRODUCTNAME=PlacelessTranslationService
 PLIST=		${WRKDIR}/pkg-plist
 WRKSRC=		${WRKDIR}/${ZOPEPRODUCTNAME}
 
+CONFLICTS=	plone-[0-9]*
+
 do-build:
 	-@${PYTHON_CMD} ${PYTHON_LIBDIR}/compileall.py ${WRKSRC}/
 
diff --git a/www/zope-plonelanguagetool/Makefile b/www/zope-plonelanguagetool/Makefile
index 44c7e3d13cd3..cf417de28732 100644
--- a/www/zope-plonelanguagetool/Makefile
+++ b/www/zope-plonelanguagetool/Makefile
@@ -32,6 +32,8 @@ ZOPEPRODUCTNAME=	PloneLanguageTool
 PLIST=	${WRKDIR}/pkg-plist
 WRKSRC=	${WRKDIR}/${ZOPEPRODUCTNAME}
 
+CONFLICTS=	plone-[0-9]*
+
 do-build:
 	@${PYTHON_CMD} ${PYTHON_LIBDIR}/compileall.py -x skins ${WRKSRC}
 
diff --git a/www/zope-portaltransforms/Makefile b/www/zope-portaltransforms/Makefile
index 491d3d03555a..b188581f1a56 100644
--- a/www/zope-portaltransforms/Makefile
+++ b/www/zope-portaltransforms/Makefile
@@ -26,6 +26,8 @@ USE_PYTHON=	yes
 USE_ZOPE=	yes
 DIST_SUBDIR=	zope
 
+CONFLICTS=	plone-[0-9]*
+
 ZOPEPRODUCTNAME=	PortalTransforms
 WRKSRC=		${WRKDIR}/${ZOPEPRODUCTNAME}
 PLIST=		${WRKDIR}/pkg-plist
diff --git a/www/zope-validation/Makefile b/www/zope-validation/Makefile
index 0bf6482921d6..822f50397dae 100644
--- a/www/zope-validation/Makefile
+++ b/www/zope-validation/Makefile
@@ -23,6 +23,8 @@ DIST_SUBDIR=	zope
 WRKSRC=	${WRKDIR}/${PORTNAME}
 PLIST=	${WRKDIR}/pkg-plist
 
+CONFLICTS=	plone-[0-9]*
+
 do-build:
 	-@${PYTHON_CMD} ${PYTHON_LIBDIR}/compileall.py ${WRKSRC}