Index: Mk/bsd.port.mk
===================================================================
--- Mk/bsd.port.mk
+++ Mk/bsd.port.mk
@@ -1089,6 +1089,20 @@
 # Do not leak flavors to childs make
 .MAKEOVERRIDES:=	${MAKEOVERRIDES:NFLAVOR=*}
 
+.if !empty(FLAVOR)
+.for c in PKGNAMEPREFIX PKGNAMESUFFIX
+.if define(${FLAVOR}_${c})
+${c}=	${${FLAVOR}_${c}}
+.endif
+.endfor
+
+.for c in CONFLICTS CONFLICTS_BUILD CONFLICTS_INSTALL
+.if define(${FLAVOR}_${c})
+${c}+=	${${FLAVOR}_${c}}
+.endif
+.endfor
+.endif # defined(${FLAVOR})
+
 .if defined(CROSS_TOOLCHAIN)
 .if !defined(CROSS_SYSROOT)
 IGNORE=	CROSS_SYSROOT should be defined