#!/usr/bin/sed
# Match the install section of the makefile
/^install:/,/^$/{
    # link commands only substitute the final PREFIX
    /^\s*ln.*$/s/\$\(PREFIX\)(\S+)$/$(DESTDIR)$(PREFIX)\1/;
    # non-inks substitute $(PREFIX) for $(DESTDIR)$(PREFIX)
    /^\s*ln.*$/!s/\$\(PREFIX\)/$(DESTDIR)$(PREFIX)/g;
    # fix manpage paths
    s|\$\(PREFIX\)/man|$(PREFIX)/share/man|g
}