make: "directive-unexport.mk" line 14: UT_A=a UT_B=b UT_C=c
make: "directive-unexport.mk" line 15: UT_A UT_B UT_C
make: "directive-unexport.mk" line 23: UT_A=a UT_B=b UT_C=c
make: "directive-unexport.mk" line 24: 
exit status 0