basically the same problem as here: https://github.com/nix-community/robotnix/issues/199
the sysimg drv has a custom install phase, where required files are not found part of sysimg-log
cp: cannot stat '/build/out/target/product/generic_x86_64/vendor-qemu.img': No such file or directory
cp: cannot stat '/build/out/target/product/generic_x86_64/system-qemu.img': No such file or directory
cp: cannot stat '/build/out/target/product/generic_x86_64/ramdisk-qemu.img': No such file or directory
cp: cannot stat '/build/out/target/product/generic_x86_64/userdata.img': No such file or directory
cp: cannot stat '/build/out/target/product/generic_x86_64/data': No such file or directory
cp: cannot stat '/build/out/target/product/generic_x86_64/VerifiedBootParams.textproto': No such file or directory
cp: missing destination file operand after '/nix/store/m5z1xv80wgfafpx4hmib3p9w9kfvqhn0-robotnix-sysimg/'
Try 'cp --help' for more information.
cp: cannot stat '/build/out/target/product/generic_x86_64/encryptionkey.img': No such file or directory
cp: cannot stat '/build/out/target/product/generic_x86_64/advancedFeatures.ini': No such file or directory