Only allow the finder to use wheels as build reqs
@@ -693,7 +693,7 @@ class WheelBuilder(object):
# Ignore the --no-binary option when installing the build system, so
# we don't recurse trying to build a self-hosting build system.
finder = copy.copy(self.finder)
- finder.format_control = FormatControl(set(), set())
+ finder.format_control = FormatControl(set(), set([":all:"]))
urls = [finder.find_requirement(InstallRequirement.from_line(r),
upgrade=False).url
for r in reqs]
