@@ -110,7 +110,7 @@ fi

 # test whether "btrfs/version.h" exists and apply btrfs_noversion appropriately

 if \

 	command -v gcc &> /dev/null \

-	&& ! gcc -E - &> /dev/null <<<'#include <btrfs/version.h>' \

+	&& ! gcc -E - -o /dev/null &> /dev/null <<<'#include <btrfs/version.h>' \

 ; then

 	DOCKER_BUILDTAGS+=' btrfs_noversion'

 fi

@@ -119,7 +119,7 @@ fi

 # functionality.

 if \

 	command -v gcc &> /dev/null \

-	&& ! ( echo -e  '#include <libdevmapper.h>\nint main() { dm_task_deferred_remove(NULL); }'| gcc -ldevmapper -xc - &> /dev/null ) \

+	&& ! ( echo -e  '#include <libdevmapper.h>\nint main() { dm_task_deferred_remove(NULL); }'| gcc -ldevmapper -xc - -o /dev/null &> /dev/null ) \

 ; then

        DOCKER_BUILDTAGS+=' libdm_no_deferred_remove'

 fi