--- py3c-1.4/tox.ini.orig
+++ py3c-1.4/tox.ini
@@ -4,7 +4,7 @@
 
 [testenv]
 allowlist_externals = make
-commands = make testbuilddir={envdir}/build test-python
+commands = gmake testbuilddir={envdir}/build test-python
 setenv=
     c90: TEST_USE_CPP=no
     c90: CFLAGS=-Werror -Wall -std=c90 -Wno-error=strict-aliasing