This bug report is a follow-up on https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=273490. In that case, tex-wb2c failed to build due to something (presumably a variable) inherited from the environment. The workaround was to remove all environment and start a new shell: $ env -i HOME="$HOME" bash --norc This is clearly not an isolated case, and finding the variable in question is difficult (I still haven't found mine). But it should be possible to remove the environment at the start of the build. This would affect the deliberate passing of variables to the build, so it needs some consideration. This report is intended as a place holder during discussion.