Hi,

The tinmop dependent package fails to build with this updated croatoan:

--8<---------------cut here---------------start------------->8---
; compiling file "/tmp/guix-build-tinmop-0.9.9.14.drv-0/source/src/windows.lisp" (written 01 JAN 1970 12:00:01 AM):
; 
; caught ERROR:
;   READ error during COMPILE-FILE:
;   
;     Symbol "DIALOG-WINDOW" not found in the DE.ANVI.CROATOAN package.
;   
;       Line: 538, Column: -1, File-Position: 19509
;   
;       Stream: #<SB-INT:FORM-TRACKING-STREAM for "file /tmp/guix-build-tinmop-0.9.9.14.drv-0/source/src/windows.lisp" {10030DDD23}>
--8<---------------cut here---------------end--------------->8---

Could you take a look? (Maybe updating tinmop too would work...)