1 make: "varmod.mk" line 42: To escape a dollar, use \$, not $$, at "$$:L} != """
2 make: "varmod.mk" line 42: Invalid variable name ':', at "$:L} != """
3 make: "varmod.mk" line 47: Dollar followed by nothing
4 make: Fatal errors encountered -- cannot continue
5 make: stopped in unit-tests