[readme] Mention problem with windows cmd echo
diff --git a/README.md b/README.md
index a264f01..489da4a 100644
--- a/README.md
+++ b/README.md
@@ -436,6 +436,8 @@
$ echo "node" > .nvmrc # to default to the latest version
```
+[NB these examples assume a POSIX-compliant shell version of `echo`. If you use a Windows `cmd` development environment, eg the `.nvmrc` file is used to configure a remote Linux deployment, then keep in mind the `"`s will be copied leading to an invalid file. Remove them.]
+
Then when you run nvm:
```sh
