+1 to the spirit. Though what user would actually want to edit these installed files? Only developers likely. Though it does match everything else.

In D2869#55503, @pgollucci wrote:

+1 to the spirit. Though what user would actually want to edit these installed files? Only developers likely. Though it does match everything else.

Well, the various INSTALL_* macros use 644/755 modes, Perl ignores those, and then, we have to do stupid stuff to go around it, like:

post-install:
        ${CHMOD} u+w ${STAGEDIR}${PREFIX}/${SITE_ARCH_REL}/auto/Set/Object/Object.so
        ${STRIP_CMD} ${STAGEDIR}${PREFIX}/${SITE_ARCH_REL}/auto/Set/Object/Object.so
        ${CHMOD} u-w ${STAGEDIR}${PREFIX}/${SITE_ARCH_REL}/auto/Set/Object/Object.so

I'm sold