Created attachment 204471 [details] Add PREFIX to MAKE_ARGS The port attempts to stage under ${STAGEDIR}/usr/local no matter what - because PREFIX is set inside the upstream's Makefile and needs to be either patched or overwritten on command-line.
A commit references this bug: Author: antoine Date: Mon May 20 06:22:05 UTC 2019 New revision: 502083 URL: https://svnweb.freebsd.org/changeset/ports/502083 Log: Make PREFIX safe PR: 237989 Changes: head/graphics/giflib/Makefile
Fixed, thanks.