Cannot load default set in .emacs-profiles.el

[slipsnip]

I get this error when I try to start emacs --with-profile default, and emacs without any arguments after having moved my .emacs.d to .doom-emacs and changing the defaults accordingly:

Error:

Warning (initialization): An error occurred while loading ‘/home/wurst/.emacs’:

File is missing: Cannot open load file, No such file or directory, core-lib

To ensure normal operation, you should investigate and remove the
cause of the error in your initialization file.  Start Emacs with
the ‘--debug-init’ option to view a complete error backtrace.

Contents of my .emacs-profiles.el

(("default" . ((user-emacs-directory . "~/.doom-emacs"))))