ggRevert "Use Nixpkgs 20.03"

This reverts commit 5921ca89f9cc6247830e92a71f7db3f1fe0c193b.

1 files changed, 2 insertions, 2 deletions

diff --git a/flake.nix b/flake.nix
index 34e1e6ffb..078f51fa4 100644
--- a/flake.nix
+++ b/flake.nix
@@ -3,7 +3,7 @@
 
   edition = 201909;
 
-  inputs.nixpkgs.uri = "nixpkgs/release-20.03";
+  inputs.nixpkgs.uri = "nixpkgs/release-19.09";
 
   outputs = { self, nixpkgs }:
 
@@ -72,7 +72,7 @@
             openssl pkgconfig sqlite
             libarchive
             boost
-            nlohmann_json
+            (nlohmann_json.override { multipleHeaders = true; })
             rustc cargo
 
             # Tests