doc: De-emphasize nix-env without -A

The manual uses `nix-env -i` without `-A` prominently, teaching a bad practice to newcomers.

1 files changed, 7 insertions, 7 deletions

diff --git a/doc/manual/src/quick-start.md b/doc/manual/src/quick-start.md
index 71205923b..b54e73500 100644
--- a/doc/manual/src/quick-start.md
+++ b/doc/manual/src/quick-start.md
@@ -19,19 +19,19 @@ to subsequent chapters.
    channel:
 
    ```console
-   $ nix-env -qa
-   docbook-xml-4.3
-   docbook-xml-4.5
-   firefox-33.0.2
-   hello-2.9
-   libxslt-1.1.28
+   $ nix-env -qaP
+   nixpkgs.docbook_xml_dtd_43                    docbook-xml-4.3
+   nixpkgs.docbook_xml_dtd_45                    docbook-xml-4.5
+   nixpkgs.firefox                               firefox-33.0.2
+   nixpkgs.hello                                 hello-2.9
+   nixpkgs.libxslt                               libxslt-1.1.28
    …
    ```
 
 1. Install some packages from the channel:
 
    ```console
-   $ nix-env -i hello
+   $ nix-env -iA nixpkgs.hello
    ```
 
    This should download pre-built packages; it should not build them