Merge branch 'nixpkgs-update' into master

1 files changed, 9 insertions, 1 deletions

diff --git a/pkgs/development/lisp-modules/README.txt b/pkgs/development/lisp-modules/README.txt
index c55fb9b1a7c..46d7208bcd2 100644
--- a/pkgs/development/lisp-modules/README.txt
+++ b/pkgs/development/lisp-modules/README.txt
@@ -1,7 +1,15 @@
 Want to add a package?  There are 3 simple steps!
 1. Add the needed system names to quicklisp-to-nix-systems.txt.
-2. cd <path to quicklisp-to-nix-systems.txt> ; nix-shell --run 'quicklisp-to-nix .'
+2. cd <path to quicklisp-to-nix-systems.txt> ; nix-shell --pure --run 'quicklisp-to-nix .'
+  You might want to specify also the --cacheSystemInfoDir and --cacheFaslDir
+  parameters to preserve some data between runs. For example, it is very
+  useful when you add new packages with native dependencies and fail to
+  specify the native dependencies correctly the first time.
+  (Might be nice to ensure the cache directories exist)
 3. Add native libraries and whatever else is needed to quicklisp-to-nix-overrides.nix.
+4. Sometimes there are problems with loading implementation-provided systems.
+  In this case you might need to add more systems in the implementation's (so
+  SBCL's) entry into *implementation-systems* in quicklisp-to-nix/system-info.lisp
 
 To update to a more recent quicklisp dist modify
 lispPackages.quicklisp to have a more recent distinfo.