make = OK, succeeds make install ln -s skalibs-126.96.36.199 skalibs
With slashpackage, you're supposed to "make -L update" and "make -L global-links" in order to update that symbolic link and others. Manually symlinking isn't enough, as you noticed:
make: *** No rule to make target '-lskarnet', needed by 'background'. Stop.
execline can't find libskarnet.so because it's not in its vpath. Are you getting the same error after running "make -L update" and "make -L global-links" in skalibs? -- Laurent