diff --git a/guix.scm b/guix.scm
index 1c9a90d..6797821 100644
--- a/guix.scm
+++ b/guix.scm
@@ -1,16 +1,20 @@
 (use-modules
-  (guix packages)
-  ((guix licenses) #:prefix license:)
-  (guix gexp)
-  (guix git-download)
-  (guix utils)
-  (guix build-system copy)
-  (gnu packages)
-  (gnu packages autotools)
-  (gnu packages guile)
-  (gnu packages guile-xyz)
-  (gnu packages pkg-config)
-  (gnu packages texinfo))
+ (guix packages)
+ ((guix licenses) #:prefix license:)
+ (guix gexp)
+ (guix git-download)
+ (guix utils)
+ (guix build-system copy)
+ (gnu packages)
+ (gnu packages autotools)
+ (gnu packages guile)
+ (gnu packages guile-xyz)
+ (gnu packages pkg-config)
+ (gnu packages texinfo))
+
+(define vcs-file?
+  (or (git-predicate (current-source-directory))
+      (const #t)))
 
 (define vcs-file?
   (or (git-predicate (current-source-directory))