I had to upgrade my Electron packages in order to do DMG builds on OS X High Sierra. Ever since then I can no longer do Squirrel builds for Windows. I'm able to build for NSIS, but that appears to be 64-bit only and does not include the updater package. I'm using Squirrel as we still have a lot of 32-bit clients and we supply auto updates via a Squirrel server.
It appears there's something incompatible between the old iconUrl parameter required by Squirrel and the new icon parameter. I've updated all my packages and the squirrel builder is a comparable version to electron builder, yet still no luck. Has anyone found a way around this problem?
After another round of updating all the related builder packages (and adding a new dependency that popped up), I had to move the iconUrl out of the build key and into a squirrelWindows key and remove NSIS completely. All good with this new config!