pkg: If the adjunct proto is a package image, use it for dependency resolution

@@ -248,14 +248,20 @@
 SYNTH_PKGS= osnet-incorporation osnet-redist
 DEP_SYNTH_PKGS= $(SYNTH_PKGS:%=$(PDIR)/%.dep)
 PROC_SYNTH_PKGS= $(SYNTH_PKGS:%=$(PDIR)/%.mog)
 
 #
-# Root of pkg image to use for dependency resolution
-# Normally / on the machine used to build the binaries
+# Root of pkg image to use for dependency resolution Normally / on the machine
+# used to build the binaries, or the ADJUNCT_PROTO
 #
-PKGDEP_RESOLVE_IMAGE = /
+PKG_ADJUNCT.cmd= if [[ -d $${ADJUNCT_PROTO}/var/pkg ]]; then \
+                echo $$ADJUNCT_PROTO; \
+        else    \
+                echo /; \
+        fi
+
+PKGDEP_RESOLVE_IMAGE = $(PKG_ADJUNCT.cmd:sh)
 
 #
 # For each package, we determine the target repository based on
 # manifest-embedded metadata.  Because we make that determination on
 # the fly, the publication target cannot be expressed as a