environ: Don't require a specific Guile version.

* guix-kernel/environ.scm (guile-current-version->path): Don't require a
specific Guile version.

guix-kernel/environ.scm

@@ -81,7 +81,7 @@
 
 (define (guile-current-version->path)
   "Return path to current guile executable file."
-  (guile->bin-path (package-name->path (string-append "guile" "@" (version)))))
+  (guile->bin-path (package-name->path "guile")))
 
 (define (guile-current-load-path->args-list)
   "Return list of load path with '-L' prefix for each path."