Fix nix build (forgot it was building from git source); patch to load module & put fns in module

module/riverguile.scm

@@ -25,7 +25,20 @@
    #:export (R
              R:input
              R:map
-             R:keyboard-group))
+             R:keyboard-group
+             riverctl
+             install-handler
+             seat
+             outputs
+             output-name
+             output-focused-tags
+             output-view-tags
+             output-urgent-tags
+             output-layout-name
+             seat-focused-output
+             seat-focused-view-title
+             seat-mode
+             ))
 
 (define (stringify x)
   (cond ((string? x) x)