diff --git a/.Rbuildignore b/.Rbuildignore
index 45e5762..48016d4 100644
--- a/.Rbuildignore
+++ b/.Rbuildignore
@@ -1,7 +1,7 @@
 ^.*\.Rproj$
 ^\.Rproj\.user$
 ^\.travis\.yml$
-^README\.*md$
+^README\.Rmd$
 ^README\.*html$
 ^NOTES\.*Rmd$
 ^NOTES\.*html$
diff --git a/.travis.yml b/.travis.yml
index d465915..debc0fd 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,9 +3,7 @@ warnings_are_errors: true
 sudo: required
 
 apt_packages:
- - binutils
- - libproj-dev
- - gdal-bin
+ - libmagic-dev
 
 env:
  global:
diff --git a/DESCRIPTION b/DESCRIPTION
index 23169a7..fbfec74 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -16,12 +16,13 @@ Suggests:
     testthat,
     tibble,
     magrittr,
-    dplyr,
-    rappdirs
+    dplyr
 Depends:
     R (>= 3.0.0)
 Imports:
     purrr,
-    Rcpp
+    Rcpp,
+    rappdirs,
+    utils
 LinkingTo: Rcpp
 RoxygenNote: 5.0.1
diff --git a/NAMESPACE b/NAMESPACE
index 37aa86d..c0e7d1e 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -3,6 +3,7 @@
 export(incant)
 export(magic_wand_file)
 import(purrr)
-import(rappdirs)
 importFrom(Rcpp,sourceCpp)
+importFrom(rappdirs,user_cache_dir)
+importFrom(utils,unzip)
 useDynLib(wand)
diff --git a/R/wand-package.R b/R/wand-package.R
index 55c463e..d373cf6 100644
--- a/R/wand-package.R
+++ b/R/wand-package.R
@@ -4,7 +4,8 @@
 #' @docType package
 #' @author Bob Rudis (@@hrbrmstr)
 #' @import purrr
-#' @import rappdirs
+#' @importFrom rappdirs user_cache_dir
 #' @useDynLib wand
 #' @importFrom Rcpp sourceCpp
+#' @importFrom utils unzip
 NULL
diff --git a/R/zzz.r b/R/zzz.r
index 4d12342..b3583ef 100644
--- a/R/zzz.r
+++ b/R/zzz.r
@@ -12,8 +12,8 @@
 #'   database is used.
 #' @export
 #' @examples
-# ' library(magrittr)
-# ' library(dplyr)
+#' library(magrittr)
+#' library(dplyr)
 #'
 #' system.file("img", package="filemagic") %>%
 #'   list.files(full.names=TRUE) %>%
diff --git a/man/magic_wand_file.Rd b/man/magic_wand_file.Rd
index 608e3de..19798ec 100644
--- a/man/magic_wand_file.Rd
+++ b/man/magic_wand_file.Rd
@@ -20,6 +20,8 @@ perform the decompression unless \code{force} is \code{TRUE} or the
 cache directory has been cleared.
 }
 \examples{
+library(magrittr)
+library(dplyr)
 
 system.file("img", package="filemagic") \%>\%
   list.files(full.names=TRUE) \%>\%
diff --git a/src/Makevars b/src/Makevars
index 0575d35..6fecd53 100644
--- a/src/Makevars
+++ b/src/Makevars
@@ -1,3 +1 @@
-CPPFLAGS =
-CXXFLAGS = -std=gnu99 -Wall -Wextra -O2 -g -fstack-protector
 PKG_LIBS = -lmagic
\ No newline at end of file