Makefile out-of-date with respect to Makefile.PL Cleaning current config before rebuilding Makefile... nmake -f Makefile.old cle Microsof D:\cpanrun\build\5-8-0\bin\perl.exe Makefile.PL Checking if your kit is complete... Looks good Writing Makefile for JavaScript::Code ==> Your Makefile has been rebuilt. <== ==> PleaNMAKE : fatal error U1077: 'false' : return code '0x1' Stop.