Add comment about PAC-based-naming

build.scm

@@ -58,6 +58,21 @@
                                       (match target
                                              ("main" "")
                                              (_ (string-append "-" target)))
+
+                                      ;; The upside of this is, you
+                                      ;; don't accidentally send
+                                      ;; someone the
+                                      ;; point-and-click-enabled
+                                      ;; version of the file.
+                                      ;;
+                                      ;; The downside is, it's easy to
+                                      ;; have file-pacON.pdf open
+                                      ;; during editing, while the
+                                      ;; script is actually compiling
+                                      ;; to file.pdf (or vice-versa),
+                                      ;; and wonder why your score
+                                      ;; isn't updating.
+
                                       (match pac
                                              ("" "-pacON")
                                              (_ ""))