make: directive-unexport.mk:19: UT_A=a UT_B=b UT_C=c
make: directive-unexport.mk:21: UT_A UT_B UT_C
make: directive-unexport.mk:30: UT_A=a UT_B=b UT_C=c
make: directive-unexport.mk:31: 
exit status 0