diff --git a/R/RcppExports.R b/R/RcppExports.R
index c07abf3..8efd9f9 100644
--- a/R/RcppExports.R
+++ b/R/RcppExports.R
@@ -11,6 +11,8 @@
 #'   Specifically, mime type, encoding, possible file extensions and
 #'   type description are returned as colums in the data frame along
 #'   with \code{path}.
+#' @note Various fields might not be available depending on the version
+#'   of \code{libmagic} you have installed.
 #' @references See \url{http://openpreservation.org/blog/2012/08/09/magic-editing-and-creation-primer/}
 #'   for information on how to create your own \code{magic} database
 #' @export
diff --git a/R/zzz.r b/R/zzz.r
index 92ac626..5d477fa 100644
--- a/R/zzz.r
+++ b/R/zzz.r
@@ -26,8 +26,10 @@ magic_wand_file <- function(force=FALSE) {
   if (!dir.exists(cache)) dir.create(cache, showWarnings=FALSE)
   if (!dir.exists(cache)) return("system")
 
-  suppressWarnings(unzip(system.file("magic.mgc.zip", package="wand"),
-        exdir=cache, overwrite=force))
+  if (!file.exists(file.path(rappdirs::user_cache_dir("wandr"), "magic.mgc"))) {
+    suppressWarnings(unzip(system.file("magic.mgc.zip", package="wand"),
+                           exdir=cache, overwrite=force))
+  }
 
   file.path(rappdirs::user_cache_dir("wandr"), "magic.mgc")
 
diff --git a/tests/testthat/test-wand.R b/tests/testthat/test-wand.R
index f4482d6..23ddde2 100644
--- a/tests/testthat/test-wand.R
+++ b/tests/testthat/test-wand.R
@@ -5,6 +5,7 @@ test_that("we can do something", {
                 magic_wand_file())
   tmp <- tmp$description
   tmp <- unlist(tmp, use.names=FALSE)
+  tmp <- sort(tmp)
 
   expect_that(tmp[2], equals("C source, ASCII text"))