Ugh, this is horrible. What can it be, if I haven't touched that file? Some macroexpansion failure? I'll have a look. João On Tue, Sep 14, 2021, 16:52 Glenn Morris wrote: > > Hi, > > Something in this appears not to bootstrap. > Ref eg https://hydra.nixos.org/build/152903587 > > progmodes/elisp-mode.el:2001:1: Error: Symbol's function definition is > void: cl-subseq > >