Required feature `esh-groups' was not provided

[Óscar Fuentes]

I'm seeing this right now while building Emacs:

In toplevel form:
eshell/esh-mode.el:63:1:Error: Required feature `esh-groups' was not provided
Compiling eshell/esh-module.el

In toplevel form:
eshell/esh-module.el:28:1:Error: Required feature `esh-groups' was not provided
Compiling eshell/esh-opt.el

In toplevel form:
eshell/esh-opt.el:27:30:Error: Required feature `esh-groups' was not provided
Compiling eshell/esh-proc.el

In toplevel form:
eshell/esh-proc.el:29:13:Error: Required feature `esh-groups' was not provided
Compiling eshell/esh-test.el

... and so on for almost all eshell source files.

-- 
Oscar