Makefile Whacking! Try to deal with the problem caused by the delay
between when something is installed and when post-install runs. Short of a global lock (which we probably need anyway someday), my solution is this. In your makefiles, add these variables before the line that has the include of $(TESTBED_SRCDIR)/GNUmakerules: SETUID_BIN_SCRIPTS = SETUID_SBIN_SCRIPTS = I have added three new rules to GNUmakerules that look like this: $(addprefix $(SBINDIR)/, $(SETUID_SBIN_SCRIPTS)): $(SBINDIR)/%: % echo "Installing (setuid) $<" -mkdir -p $(INSTALL_SBINDIR) $(SUDO) $(INSTALL) -o root -m 4755 $< $@ Yep, your eyes ain't lying to you; use sudo to run the target so that install does the right thing (which is that the old file is not replaced until the new one has the proper attributes on it). Note that post-install is still needed for the initial install, but should no longer be needed for day to day installs since all that other stuff post-install does is mkdir/chmod on directories.