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.