Use boost::format from the boost package

Note that this only requires headers from boost so it doesn't add a
runtime dependency.

Also, use Nixpkgs 18.03.

1 files changed, 2 insertions, 1 deletions

diff --git a/shell.nix b/shell.nix
index d6ae5a552..09318dfd0 100644
--- a/shell.nix
+++ b/shell.nix
@@ -1,6 +1,6 @@
 { useClang ? false }:
 
-with import <nixpkgs> {};
+with import (builtins.fetchGit { url = https://github.com/NixOS/nixpkgs.git; ref = "release-18.03"; }) {};
 
 with import ./release-common.nix { inherit pkgs; };
 
@@ -18,6 +18,7 @@ with import ./release-common.nix { inherit pkgs; };
         customMemoryManagement = false;
       })
       autoreconfHook
+      boost
 
       # For nix-perl
       perl