X-Git-Url: https://code.delx.au/gnu-emacs-elpa/blobdiff_plain/d306222c5786e8cd5e1b6f77a5c12741820fb7a9..e5ce35751236d77c15904e0f8f0f816ba8b517f8:/README

diff --git a/README b/README
index 33e40fc9f..a68804006 100644
--- a/README
+++ b/README
@@ -92,18 +92,31 @@ merge -s subtree" from the upstream branch.
 
 In the `external' case, the copy of the code is not kept here but in the
 `externals/<pkg>' branch in the `elpa' repository.
+
 You can check out all the external packages into the `packages' directory
 with the command:
 
    make externals
 
+You can check out a specific external PACKAGE into the `packages'
+directory with these commands:
+
+   cd packages
+   git clone --reference .. --single-branch --branch externals/PACKAGE $(git config remote.origin.url) PACKAGE
+
+If you already have a packages/PACKAGE directory with a previous
+checkout, you can update it like this:
+
+   cd packages/PACKAGE
+   git pull
+
 ** Public incubation
 
 If you want to develop a package publicly prior to its first release (to
 benefit from others' feedback, primarily), but not in an external repo,
 you have 2 choices:
-- you can simply put "Version: -1" to indicate that this should not be
-  released.
+- you can simply put "Version: 0" to indicate that this should not be
+  released yet.
 - or you can push to an "ephemeral" branch -- subject to rebase and eventual
   removal upon finishing merge -- for the duration of the incubation.