Fix license field for Guix package

guix.scm

@@ -24,6 +24,8 @@
   (with-directory-excursion directory
     (read-line (open-pipe* OPEN_READ "git" "describe" "--always" "--tags"))))
 
+(define license (@@ (guix licenses) license))
+
 (define source-dir (dirname (current-filename)))
 
 (define-public avp
@@ -33,7 +35,7 @@
     (source (local-file source-dir #:recursive? #t #:select? (git-predicate source-dir)))
     (build-system cmake-build-system)
     (arguments
-     '(#:tests? #f))
+     (list #:tests? #f))
     (inputs
      (list ffmpeg mesa openal sdl2))
     (home-page "https://sr.ht/~jetomit/avp")
@@ -41,6 +43,6 @@
     (description "Unofficial Linux port of the game engine for the Rebellion
 Developments game Aliens Versus Predator.  This package does not
 provide game assets.")
-    (license "file:///LICENSE")))
+    (license (license "avp" "file:///LICENSE" "Aliens Versus Predator license"))))
 
 avp