DOC: Overview of Nixpkgs/channels/Hydra/tests (close #11263)

What I missed when I began using Nix and NixOS was a clear overview of
how packages, channels, Hydra, the master branch and updates to channels
relate to each other.

I've noticed I am not the only one, given the amount of times these
questions pop up.

For now I propose to include this in the Nixpkgs manual, since this
seems to be the best fit. However, I think it would be good to include
this in either a new manual, i.e., a user manual, or an 'official'
tutorial.

1 files changed, 5 insertions, 0 deletions

diff --git a/doc/default.nix b/doc/default.nix
index 7e41380d6358..65e12254f78d 100644
--- a/doc/default.nix
+++ b/doc/default.nix
@@ -43,6 +43,11 @@ stdenv.mkDerivation {
     cp -s '${sources-langs}'/* ./languages-frameworks
   ''
   + toDocbook {
+      inputFile = ./introduction.md;
+      outputFile = "introduction.xml";
+      useChapters = true;
+    }
+  + toDocbook {
       inputFile = ./haskell-users-guide.md;
       outputFile = "haskell-users-guide.xml";
       useChapters = true;