[Nix-dev] Postgis issues

[adam at gamb.co]

Hi All,

New to Nix, I can't figure out where i'm going wrong with postgis. Known 
issue building 1_5_1 so i'm skipping to 1_5_8 using `callPackage`.

Configured as follows:

   services.postgresql = {
     enable = true;
     package = pkgs.postgresql;
     extraPlugins = [ (pkgs.callPackage 
/path/to/nixpkgs/pkgs/development/libraries/postgis {}).v_1_5_8 ];
   };

Rebuilding OS works fine. Postgis appears to install (I can see 
postgis-1.5.so), but i'm missing `postgis.control` and presumably one 
extra step?

'CREATE EXTENSION postgis; ERROR:  could not open extension control file 
"/nix/store/[...]-postgresql-and-plugins-9.2.9/share/extension/postgis.control"'

Greatly appreciate any tips on how to debug this.

Adam