Build error depending on $VERBOSE flag

[realsimix]

Hi,

I've just tried to rebuild my packages with latest code and found this strange issue. If $VERBOSE is empty or undefined, I get this build error on RHEL 7:

+ /usr/bin/make CONFIGURE=/home/pkgbuild/rpmbuild/BUILD/nx-libs-3.5.99.27/local_configure \
    LIBDIR=/usr/lib64 'CDEBUGFLAGS=-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions \
    -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches   -m64 -mtune=generic' \
    'LOCAL_LDFLAGS=-Wl,-z,relro ' 'SHLIBGLOBALSFLAGS=-Wl,-z,relro ' IMAKE_DEFINES=-DUseTIRPC=NO VERBOSE=
Makefile:36: xkbcomp devel package missing, using imake default values

===> build
Makefile:36: xkbcomp devel package missing, using imake default values

===> imakeconfig
make[3]: xmakefile: No such file or directory
make[3]: *** No rule to make target `xmakefile'.  Stop.
make[2]: *** [VerifyOS] Error 2
make[1]: *** [imakeconfig] Error 2
make: *** [build] Error 2

This was not a problem with 3.5.99.26 and only happens on a bit older distributions.

I didn't dig into details because adding VERBOSE=1 is an easy fix. But, does anyone have an idea where this comes from?

Thanks, Simon