diff --git a/Initialization-options.md b/Initialization-options.md
index 0306709..d646177 100644
--- a/Initialization-options.md
+++ b/Initialization-options.md
@@ -32,18 +32,18 @@ You may use `clang.excludeArgs` to exclude GCC specific options that are unknown
 
 ## `clang.pathMappings`
 
-If cache files were built with project root `/tmp/container`, and you want to reuse them with a different project root `/host`:
+If cache files were built with project root `/tmp/container/proj`, and you want to reuse them with a different project root `/host/proj`:
 ```javascript
-{ "clang": { "pathMappings": ["/container:/host"] }
+{ "clang": { "pathMappings": ["/container/:/host/"] }
 ```
 
 Copy cache files:
 ```zsh
-rsync -a /tmp/ccls/@tmp@container/ /tmp/ccls/@tmp@host/ # files under project root
-rsync -a /tmp/ccls/@@tmp@container/ /tmp/ccls/@@tmp@host/ # files outside of project root
+rsync -a /tmp/ccls/@tmp@container@proj/ /tmp/ccls/@tmp@host@proj/ # files under project root
+rsync -a /tmp/ccls/@@tmp@container@proj/ /tmp/ccls/@@tmp@host@proj/ # files outside of project root
 ```
 
-Open `/tmp/host/a.cc`, the cache file `/tmp/ccls/@tmp@host/a.cc.blob` will be reused. When `a.cc` is saved (re-indexed), the newly generated `a.cc.blob` will not contain `/tmp/container` paths any more.
+Open `/tmp/host/proj/a.cc`, the cache file `/tmp/ccls/@tmp@host@proj/a.cc.blob` will be reused. When `a.cc` is saved (re-indexed), the newly generated `a.cc.blob` will not contain `/tmp/container` paths any more.
 
 ## `client.snippetSupport`