[Libguestfs] Makefile probably incorrect

I am a Manjaro user and was compiling libguestfs today from the AUR (it doesn't reside on Arch/Manjaro repos) and got the following error: "make[2]: Leaving directory '/home/matador/AUR/libguestfs-git/src/libguestfs/common/errnostring' Making all in common/protocol make[2]: Entering directory '/home/matador/AUR/libguestfs-git/src/libguestfs/common/protocol' make[2]: *** No rule to make target 'guestfs_protocol.c', needed by 'all'. Stop. make[2]: Leaving directory '/home/matador/AUR/libguestfs-git/src/libguestfs/common/protocol' make[1]: *** [Makefile:2380: all-recursive] Error 1 make[1]: Leaving directory '/home/matador/AUR/libguestfs-git/src/libguestfs' make: *** [Makefile:2280: all] Erro 2 ==> ERRO: Uma falha ocorreu em build()." Apparently a makefile error, as there's no 'guestfs_protocol.c' file in that directory (or in the whole source code, in fact), although it is referenced by the Makefile.