Index: Mk/Scripts/do-depends.sh
===================================================================
--- Mk/Scripts/do-depends.sh
+++ Mk/Scripts/do-depends.sh
@@ -11,41 +11,61 @@
 	dp_DEPENDS_CLEAN dp_DEPENDS_ARGS dp_USE_PACKAGE_DEPENDS \
 	dp_USE_PACKAGE_DEPENDS_ONLY dp_PKG_ADD dp_PKG_INFO dp_WRKDIR \
 	dp_PKGNAME dp_STRICT_DEPENDS dp_LOCALBASE dp_LIB_DIRS dp_SH \
-	dp_SCRIPTSDIR PORTSDIR dp_MAKE
+	dp_SCRIPTSDIR PORTSDIR dp_MAKE dp_USE_REPO_DEPENDS \
+	dp_USE_REPO_DEPENDS_ONLY dp_PKG_INSTALL
 
 set -u
 
 install_depends()
 {
-	origin=$1
-	target=$2
-	depends_args=$3
-	if [ -z "${dp_USE_PACKAGE_DEPENDS}" -a -z "${dp_USE_PACKAGE_DEPENDS_ONLY}" ]; then
-		${dp_MAKE} -C ${origin} -DINSTALLS_DEPENDS ${target} ${depends_args}
-		return 0
-	fi
+	local origin=$1
+	local target=$2
+	local depends_args=$3
+
+	local no_source="${dp_USE_PACKAGE_DEPENDS_ONLY}${dp_USE_REPO_DEPENDS_ONLY}"
+	local non_source="${dp_USE_PACKAGE_DEPENDS}${dp_USE_REPO_DEPENDS}${no_source}"
+
+	local success="no"
+
+	if [ -n "${non_source}" -a "${target}" = "${dp_DEPENDS_TARGET}" ]; then
+		read pkgbase <<- EOF
+		$(${dp_MAKE} -C ${origin} -VPKGBASE)
+		EOF
+
+		local use_package="${dp_USE_PACKAGE_DEPENDS}${dp_USE_PACKAGE_DEPENDS_ONLY}"
+		if [ -n "${use_package}" -a "${success}" = "no" ]; then
+			read pkgfile <<- EOF
+			$(${dp_MAKE} -C ${origin} -VPKGFILE)
+			EOF
+
+			if [ -r "${pkgfile}" ]; then
+				echo "===>   Installing existing package ${pkgfile}"
+				if [ "${pkgbase}" = "pkg" -o "${pkgbase}" = "pkg-devel" ]; then
+					[ -d ${dp_WRKDIR} ] || mkdir -p ${dp_WRKDIR}
+					tar xf ${pkgfile} -C ${dp_WRKDIR} -s ",/.*/,,g" "*/pkg-static"
+					${dp_WRKDIR}/pkg-static add ${pkgfile} && success="yes"
+					rm -f ${dp_WRKDIR}/pkg-static
+				else
+					${dp_PKG_ADD} -A ${pkgfile} && success="yes"
+				fi
+			fi
+		fi
 
-	read pkgfile <<- EOF
-	$(${dp_MAKE} -C ${origin} -VPKGFILE)
-	EOF
-	read pkgbase <<- EOF
-	$(${dp_MAKE} -C ${origin} -VPKGBASE)
-	EOF
-	if [ -r "${pkgfile}" -a "${target}" = "${dp_DEPENDS_TARGET}" ]; then
-		echo "===>   Installing existing package ${pkgfile}"
-		if [ "${pkgbase}" = "pkg" ]; then
-			[ -d ${dp_WRKDIR} ] || mkdir -p ${dp_WRKDIR}
-			tar xf ${pkgfile} -C ${dp_WRKDIR} -s ",/.*/,,g" "*/pkg-static"
-			${dp_WRKDIR}/pkg-static add ${pkgfile}
-			rm -f ${dp_WRKDIR}/pkg-static
-		else
-			${dp_PKG_ADD} -A ${pkgfile}
+		local use_repo="${dp_USE_REPO_DEPENDS}${dp_USE_REPO_DEPENDS_ONLY}"
+		if [ -n "${use_repo}" -a "${success}" = "no" ]; then
+			echo "===>   Installing package ${pkgbase} from repository"
+			env ASSUME_ALWAYS_YES=yes ${dp_PKG_INSTALL} -A ${pkgbase} && success="yes"
 		fi
-	elif [ -n "${dp_USE_PACKAGE_DEPENDS_ONLY}" -a "${target}" = "${dp_DEPENDS_TARGET}" ]; then
-		echo "===>   ${dp_PKGNAME} depends on package: ${pkgfile} - not found" >&2
-		echo "===>   dp_USE_PACKAGE_DEPENDS_ONLY set - not building missing dependency from source" >&2
-		exit 1
-	else
+
+		if [ -n "${no_source}" -a "${success}" = "no" ]; then
+			echo "===>   ${dp_PKGNAME} depends on package: ${pkgfile} - not found" >&2
+			echo "===>   dp_USE_PACKAGE_DEPENDS_ONLY or dp_USE_REPO_DEPENDS_ONLY set" >&2
+			echo "===>   not building missing dependency from source" >&2
+			exit 1
+		fi
+	fi
+
+	if [ ${success} = no ]; then
 		${dp_MAKE} -C ${origin} -DINSTALLS_DEPENDS ${target} ${depends_args}
 	fi
 }
Index: Mk/bsd.commands.mk
===================================================================
--- Mk/bsd.commands.mk
+++ Mk/bsd.commands.mk
@@ -129,5 +129,6 @@
 PKG_CREATE?=		${PKG_BIN} create
 PKG_ADD?=		${PKG_BIN} add
 PKG_QUERY?=		${PKG_BIN} query
+PKG_INSTALL?=		${PKG_BIN} install -y
 
 .endif
Index: Mk/bsd.port.mk
===================================================================
--- Mk/bsd.port.mk
+++ Mk/bsd.port.mk
@@ -1043,6 +1043,12 @@
 #				  if an existing package is not present.
 # USE_PACKAGE_DEPENDS_ONLY
 #				- Like USE_PACKAGE_DEPENDS, but do not fallback on source.
+# USE_REPO_DEPENDS
+#				- Try to install dependencies from package repositories
+#				  instead of building the port from scratch. Fall back on
+#				  source if the package is not available in the repository.
+# USE_REPO_DEPENDS_ONLY
+#				- Like USE_REPO_DEPENDS, but do not fallback on source.
 # INSTALL_AS_USER
 #				- Define this to install as the current user, intended
 #				  for systems where you have no root access.
@@ -4341,8 +4347,11 @@
 		dp_DEPENDS_ARGS="${DEPENDS_ARGS}" \
 		dp_USE_PACKAGE_DEPENDS="${USE_PACKAGE_DEPENDS}" \
 		dp_USE_PACKAGE_DEPENDS_ONLY="${USE_PACKAGE_DEPENDS_ONLY}" \
+		dp_USE_REPO_DEPENDS="${USE_REPO_DEPENDS}" \
+		dp_USE_REPO_DEPENDS_ONLY="${USE_REPO_DEPENDS_ONLY}" \
 		dp_PKG_ADD="${PKG_ADD}" \
 		dp_PKG_INFO="${PKG_INFO}" \
+		dp_PKG_INSTALL="${PKG_INSTALL}" \
 		dp_WRKDIR="${WRKDIR}" \
 		dp_PKGNAME="${PKGNAME}" \
 		dp_STRICT_DEPENDS="${STRICT_DEPENDS}" \