Can anybody reproduce this, with dmd 2.078.0 on Windows: mkdir ddox cd ddox dub init dub build -b ddox A popup appears with Unexpected OPTLINK Termination at EIP=0040F60A EAX=08050000 EBX=00438C70 ECX=000009B3 EDX=000003D7 ESI=0000009F EDI=08051934 EBP=0019FF38 ESP=0019FEF0 First=00402000 Thanks, Bastiaan.