/usr/bin/objdump is provided by obsolete GNU binutils 2.17.50, and is expectd to be removed by FreeBSD 13.0. The www/node* packages are one of three groups that failed in an exp-run.
Node.js compile error: could not find objdump
Check that GNU binutils are installed and included in PATH
Most likely www/node* should just depend on devel/binutils if it needs objdump.
A commit references this bug:
Date: Wed May 6 18:09:42 UTC 2020
New revision: 534197
www/node*: add binutils dep on objdump
/usr/bin/objdump will be removed from FreeBSD before FreeBSD 13.0.
Approved by: bapt
Sponsored by: The FreeBSD Foundation