hack: use PKG_CONFIG var when checking libdevmapper

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

hack/make.sh

@@ -90,11 +90,7 @@ fi
 # functionality. We favour libdm_dlsym_deferred_remove over
 # libdm_no_deferred_remove in dynamic cases because the binary could be shipped
 # with a newer libdevmapper than the one it was built with.
-if
-	command -v gcc &> /dev/null \
-		&& ! (echo -e '#include <libdevmapper.h>\nint main() { dm_task_deferred_remove(NULL); }' | gcc -xc - -o /dev/null $(pkg-config --libs devmapper) &> /dev/null) \
-		;
-then
+if command -v gcc &> /dev/null && ! (echo -e '#include <libdevmapper.h>\nint main() { dm_task_deferred_remove(NULL); }' | gcc -xc - -o /dev/null $(${PKG_CONFIG} --libs devmapper 2> /dev/null) &> /dev/null); then
 	add_buildtag libdm dlsym_deferred_remove
 fi