At present, if you build without Jieubsida but with documentation - which is the default configuration - the build dies because the documentation wants Jieubsida. The build system should pass information into demo.tex, probably through version.tex, on which fonts are actually being built, the demo should do conditionals to only demonstrate the fonts really being built, and its Makefile dependencies should adjust accordingly (which will require some smarts beyond the generic scan-the-TeX stuff currently used).
Works well enough now. Some configurations may still fail, but the motivating application (build without Jieubsida) works - and is less important now we've got kerning for those fonts anyway.
At present, if you build without Jieubsida but with documentation - which is the default configuration - the build dies because the documentation wants Jieubsida. The build system should pass information into demo.tex, probably through version.tex, on which fonts are actually being built, the demo should do conditionals to only demonstrate the fonts really being built, and its Makefile dependencies should adjust accordingly (which will require some smarts beyond the generic scan-the-TeX stuff currently used).