Mysticism! 
Everything worked out today.
Output: "c:\data\projects\strawberry\msvc_\build_release\strawberry\build\StrawberrySetup-1.2.13.3.gce4f2ece-msvc-x64.exe"
Install: 7 pages (448 bytes), 12 sections (24864 bytes), 933 instructions (26124 bytes), 509 strings (88228 bytes), 1 language table (318 bytes).
Uninstall: 4 pages (320 bytes), 1 section (2072 bytes), 490 instructions (13720 bytes), 350 strings (14474 bytes), 1 language table (282 bytes).
Datablock optimizer saved 55686 bytes (~0.0%).
Using lzma (compress whole) compression.
EXE header size: 64512 / 38912 bytes
Install code: (140446 bytes)
Install data: (181707820 bytes)
Uninstall code+data: (122942 bytes)
Compressed data: 73031100 / 181971208 bytes
CRC (0xAEF4CE05): 4 / 4 bytes
Total size: 73095616 / 182010124 bytes (40.1%)