Hartmut Goebel schreef op zo 10-04-2022 om 20:57 [+0200]: > * Shall the build system actually be called „rebar*3*“ or just „rebar“? There >   is also a build-tool „rebar2“, which is obsoltete and not supported by this >   build-system. Anyhow, somewhen in the future there might be some „rebar4“, >   which we might be able to cover with the same build-system. WDYT? Was the rebar2 --> rebar3 change mostly backwards-compatible, and would a hypothetical rebar2 or rebar4 build system look mostly the same? If both hold, I would treat rebar2 --> rebar3 as ‘merely’ a package update from python@2 to python@3 -- some breaking changes, but no need for separate build systems (and hence, no 3 suffix) If rebar2, rebar3 and rebar4 would require completely different phases and use different file formats or such, IMO a separate build system (and hence, a 2, 3 or 4 suffix) may be useful. Greetings, Maxime.