Can't add external project using ExternalProject_Add in CMake - build

Question

The problem I have is very strange: I try to add an external project (the metis library) to my CMake project:
set(METIS_VERSION "5.1.0")
set(METIS_ARCHIVE "${PROJECT_SOURCE_DIR}/third-party/metis-${METIS_VERSION}.tar.gz")
if(NOT EXISTS ${METIS_ARCHIVE})
set(METIS_ARCHIVE "http://glaros.dtc.umn.edu/gkhome/fetch/sw/metis/metis-${METIS_VERSION}.tar.gz")
endif()
set(METIS_DIR ${PROJECT_BINARY_DIR}/third-party/metis)
set(METIS_ROOT ${METIS_DIR}/src/Metis)
ExternalProject_Add(Metis
PREFIX ${METIS_DIR}
DOWNLOAD_DIR "${PROJECT_SOURCE_DIR}/third-party"
URL ${METIS_ARCHIVE}
URL_HASH "MD5=5465e67079419a69e0116de24fce58fe"
PATCH_COMMAND patch ${METIS_ROOT}/CMakeLists.txt < ${PROJECT_SOURCE_DIR}/cmake/Metis-CMakeLists.txt.patch
SOURCE_DIR ${METIS_ROOT}
CONFIGURE_COMMAND $(MAKE) config shared=1 prefix=${METIS_ROOT} cc=${CMAKE_C_COMPILER}
BINARY_DIR ${METIS_ROOT}
BUILD_COMMAND $(MAKE)
)
The configure goes fine, but when I try to make, I get the following error message:
[100%] Built target metis
make[5]: *** No rule to make target `s'. Stop.
make[4]: *** [all] Error 2
make[3]: *** [third-party/metis/src/Metis-stamp/Metis-build] Error 2
make[2]: *** [CMakeFiles/Metis.dir/all] Error 2
make[1]: *** [all] Error 2
make: *** [all] Error 2
Now the interesting part, if I invoke make in verbose mode (VERBOSE=1 make), the code runs fine and I have no errors. Also, I checked running make -C build/Darwin-x86_64/third-party/metis/src/Metis/ and this also works fine
Does someone know what's the issue here?
aa

Answer 1

I checked running make -C build/Darwin-x86_64/third-party/metis/src/Metis/ and this also works fine
99,9% blame environment (:
You can test it by using printenv command:
BUILD_COMMAND printenv && make
copy the result of printenv and compare it with the "clean" one. You must see some diffs, for me it's:
MFLAGS
MAKEFLAGS
MAKELEVEL
I don't know what is the reason of the issue exactly but when I unset this variables everything works fine (note that you need to update the install command too):
BUILD_COMMAND unset MFLAGS && unset MAKEFLAGS && unset MAKELEVEL && make
INSTALL_COMMAND unset MFLAGS && unset MAKEFLAGS && unset MAKELEVEL && make install