project('run always', 'c') version = '1.0.0' vgen = find_program('version_gen.py') version_src = custom_target('Version string', input : 'version.c.in', output : 'version.c', command : [vgen, '@INPUT@', '@OUTPUT@', version], build_always : true, ) executable('versionprinter', 'main.c', version_src)