gnu: chez-scheme: Install libraries to 'lib/csvX.Y.Z-site'

* gnu/packages/chez.scm (chez-make-flags): Add 'chezversion'.

Co-authored-by: Ludovic Courtès <ludo@gnu.org>

gnu/packages/chez.scm

@@ -416,9 +416,13 @@ (define chez-configure
 ;; files.
 (define (chez-make-flags name version)
   `(let ((out (assoc-ref %outputs "out")))
-     (list (string-append "PREFIX=" out)
-           (string-append "DOCDIR=" out "/share/doc/"
-                          ,name "-" ,version))))
+     (list
+      ;; Set 'chezversion' so that libraries are installed in
+      ;; 'lib/csvX.Y.Z-site' like Chez's 'native-search-paths' expects.
+      (string-append "chezversion=" ,(package-version chez-scheme))
+      (string-append "PREFIX=" out)
+      (string-append "DOCDIR=" out "/share/doc/"
+                     ,name "-" ,version))))
 
 (define-public chez-matchable
   (package