built-ins: eval: Import '(gash compat)'.

* gash/built-ins/eval.scm (define-module): Import '(gash compat)'.

gash/built-ins/eval.scm

@@ -18,6 +18,7 @@
 
 (define-module (gash built-ins eval)
   #:use-module (gash built-ins utils)
+  #:use-module (gash compat)
   #:use-module (gash environment)
   #:use-module (gash parser)
   #:use-module (ice-9 match))