Not for prebuilt binaries (variants are just separate packages) but because the pkgsrc repo is just a collection of Makefiles, you can cd into the directory and

Not for prebuilt binaries (variants are just separate packages) but because the pkgsrc repo is just a collection of Makefiles, you can cd into the directory and run bmake show-options Then set PKG_OPTIONS.somepkg and bmake install Or even just edit the Makefile.