import/cran: Add more strings to invalid-packages.

* guix/import/cran.scm (invalid-packages): Add none, windows, and xcode.

diff --git a/guix/import/cran.scm b/guix/import/cran.scm
index d7f6945..d60e9a3 100644 (file)
--- a/guix/import/cran.scm
+++ b/guix/import/cran.scm
@@ -360,8 +360,11 @@ empty list when the FIELD cannot be found."
 (define invalid-packages
   (list "c++11"
         "c++14"
-        "linux"
         "getopt::long"
+        "linux"
+        "none"
+        "windows"
+        "xcode"
         "xquartz"))
 
 (define cran-guix-name (cut guix-name "r-" <>))