diff --git a/Makefile.inc1 b/Makefile.inc1
--- a/Makefile.inc1
+++ b/Makefile.inc1
@@ -577,21 +577,20 @@
 _TIMENOW=	${_STRTIMENOW:gmtime}
 BRANCH_EXT=
 .if ${_BRANCH:MCURRENT*} || ${_BRANCH:MSTABLE*} || ${_BRANCH:MPRERELEASE*}
-_PKG_REVISION=	${MAJOR_REVISION}
-BRANCH_EXT=	snap
-EXTRA_REVISION=	.${BRANCH_EXT}${_TIMENOW}
+_PKG_REVISION:= ${MAJOR_REVISION}
+BRANCH_EXT=	${MAJOR_REVISION}.snap
+EXTRA_REVISION=	.snap${_TIMENOW}
 .elif ${_BRANCH:MALPHA*}
-BRANCH_EXT=	a${_BRANCH:C/ALPHA([0-9]+).*/\1/}
-EXTRA_REVISION=	.${BRANCH_EXT}.${_TIMENOW}
+BRANCH_EXT=	alpha
+EXTRA_REVISION=	.${_BRANCH:C/ALPHA([0-9]+).*/\1/}.${_TIMENOW}
 .elif ${_BRANCH:MBETA*}
-BRANCH_EXT=	b${_BRANCH:C/BETA([0-9]+).*/\1/}
-EXTRA_REVISION=	.${BRANCH_EXT}.${_TIMENOW}
+BRANCH_EXT=	beta
+EXTRA_REVISION=	.${_BRANCH:C/BETA([0-9]+).*/\1/}.${_TIMENOW}
 .elif ${_BRANCH:MRC*}
-BRANCH_EXT=	rc${_BRANCH:C/RC([0-9]+).*/\1/}
-EXTRA_REVISION=	.${BRANCH_EXT}.${_TIMENOW}
+BRANCH_EXT=	rc
+EXTRA_REVISION=	.rc${_BRANCH:C/RC([0-9]+).*/\1/}.${_TIMENOW}
 .elif ${_BRANCH:M*-p*}
-BRANCH_EXT=	p${_BRANCH:C/.*-p([0-9]+$)/\1/}
-EXTRA_REVISION=	${BRANCH_EXT}
+EXTRA_REVISION=	p${_BRANCH:C/.*-p([0-9]+$)/\1/}
 .endif
 PKG_VERSION:=	${_PKG_REVISION}${EXTRA_REVISION:C/[[:space:]]//g}
 .endif
@@ -2040,7 +2039,16 @@
 .if exists(${PKG_ABI_FILE}) && exists(${REPODIR}/${PKG_ABI})
 PKG_VERSION_FROM!=/usr/bin/readlink ${REPODIR}/${PKG_ABI}/latest
 PKG_VERSION_FROM_DIR=	${REPODIR}/${PKG_ABI}/${PKG_VERSION_FROM}
-BRANCH_EXT_FROM=	${PKG_VERSION_FROM:C/^[^[:alpha:]]+p?([[:alpha:]]*)[0-9]+$/\1/}
+BRANCH_EXT_FROM=
+.if ${PKG_VERSION_FROM:M*.snap*}
+BRANCH_EXT_FROM=	${PKG_VERSION_FROM:C/.snap.*$//}.snap
+.elif ${PKG_VERSION_FROM:M*.b*}
+BRANCH_EXT_FROM=	beta
+.elif ${PKG_VERSION_FROM:M*.rc*}
+BRANCH_EXT_FROM=	rc
+.elif ${PKG_VERSION_FROM:M*.a*}
+BRANCH_EXT_FROM=	alpha
+.endif
 .else
 PKG_VERSION_FROM=
 PKG_VERSION_FROM_DIR=
@@ -2081,7 +2089,7 @@
 	    continue; \
 	  fi ; \
 	  newsum=$$(pkg query -F ${REPODIR}/${PKG_ABI}/${PKG_VERSION}/$${newpkgname} '%X') ; \
-	  if [ "${BRANCH_EXT_FROM}" == "${BRANCH_EXT:C/[0-9]+$//}" -a "$${oldsum}" == "$${newsum}" ]; then \
+	  if [ "${BRANCH_EXT_FROM}" = "${BRANCH_EXT}" -a "$${oldsum}" = "$${newsum}" ]; then \
 	   echo "==> Keeping old ${PKG_NAME_PREFIX}-$${pkgname}-${PKG_VERSION_FROM}.${PKG_EXT}" ; \
 	   rm ${REPODIR}/${PKG_ABI}/${PKG_VERSION}/$${newpkgname} ; \
 	   cp $${pkg} ${REPODIR}/${PKG_ABI}/${PKG_VERSION} ; \