diff --git a/doc/manual/src/command-ref/nix-shell.md b/doc/manual/src/command-ref/nix-shell.md
index 9f36929f7..576e5ba0b 100644
--- a/doc/manual/src/command-ref/nix-shell.md
+++ b/doc/manual/src/command-ref/nix-shell.md
@@ -120,7 +120,8 @@ shell in which to build it:
 ```console
 $ nix-shell '<nixpkgs>' -A pan
 [nix-shell]$ eval ${unpackPhase:-unpackPhase}
-[nix-shell]$ cd pan-*
+[nix-shell]$ cd $sourceRoot
+[nix-shell]$ eval ${patchPhase:-patchPhase}
 [nix-shell]$ eval ${configurePhase:-configurePhase}
 [nix-shell]$ eval ${buildPhase:-buildPhase}
 [nix-shell]$ ./pan/gui/pan