Substitution in R package recipe produces invalid LDFLAGS when R installation hash starts with "lz" #6078

    @run_after("install")
    def copy_makeconf(self):
        # Ensure full library flags are included in Makeconf
        for _lib, _pkg in [
            ("lzma", "xz"),
            ("bz2", "bzip2"),
            ("z", "zlib-api"),
            ("tirpc", "libtirpc"),
            ("icuuc", "icu4c"),
        ]:
            filter_file(
                f"-l{_lib}",
                f"-L{self.spec[_pkg].libs.directories[0]} -l{_lib}",
                join_path(self.etcdir, "Makeconf"),
            )

        # Make a copy of Makeconf because it will be needed to properly build R
        # dependencies in Spack.
        src_makeconf = join_path(self.etcdir, "Makeconf")
        dst_makeconf = join_path(self.etcdir, "Makeconf.spack")
        install(src_makeconf, dst_makeconf)