I have almost exactly this problem:
Except the error references a different file:
/nix/store/lpym10jsrl5bw27mqw7h2kl01ji06m84-installer/bin/installer: line 9: /nix/store/x8v935w8lg1wwdbal6316f4s9bx7lqn7-utils.sh: No such file or directory
What can I do to get a clean install? I imagine that the installer left some kind of reference to that file on my system, so I probably have to delete the reference, but I don’t know where it is (I didn’t find the cache file indicated in the link above)
Thanks for your help.