https://bugs.gentoo.org/790338
--- a/src/uct/ib/Makefile.am
+++ b/src/uct/ib/Makefile.am
@@ -13,7 +13,7 @@ libuct_ib_la_CFLAGS   = $(BASE_CFLAGS)
 libuct_ib_la_LIBADD   = $(top_builddir)/src/ucs/libucs.la \
                         $(top_builddir)/src/uct/libuct.la
 libuct_ib_la_LDFLAGS  = $(IBVERBS_LDFLAGS) $(NUMA_LIBS) -version-info $(SOVERSION)
-libmlx5_ver           = $(shell (rpm -qf $(IBVERBS_DIR)/include/infiniband/mlx5_hw.h &>/dev/null && rpm -qf /usr/include/infiniband/mlx5_hw.h) | grep -v 'not owned' | head -1)
+libmlx5_ver           = $(shell (false -qf $(IBVERBS_DIR)/include/infiniband/mlx5_hw.h &>/dev/null && false -qf /usr/include/infiniband/mlx5_hw.h) | grep -v 'not owned' | head -1)
 
 noinst_HEADERS = \
 	base/ib_device.h \