When using a Liquid Glass app icon created on macOS 26 with Icon Composer, the build fails with this error:

FAILED: Expected all non-binary files to have identical SHAs when creating a universal build but "Contents/Resources/Assets.car" did not

This is because the Assets.car file, which contains the Liquid Glass icon, is generated once for each architecture. The names of the images inside the car file differ, because they contain random UUIDs, e.g.

Icon1024x1024_NSAppearanceNameSystem_FC7B86C9-F327-47AA-9926-9A6A879CE7BC-99486-00000A6E081E9103_Normal@2x
vs
Icon1024x1024_NSAppearanceNameSystem_719459F9-294E-451B-B84E-1D11A5C51D58-99530-00000A6E0A59E574_Normal@2x