1 files changed, 21 insertions, 1 deletions
diff --git a/shell.nix b/shell.nix
index 7e3704d010..63e5af0525 100644
--- a/shell.nix
+++ b/shell.nix
@@ -1,9 +1,29 @@
 let
   # We specify sources via Niv: use "niv update nixpkgs" to update nixpkgs, for example.
   sources = import ./util/nix/sources.nix { };
+
+  # `tomlkit` >= 0.8.0 is required to build `jsonschema` >= 4.11.0 (older
+  # version do not support some valid TOML syntax: sdispater/tomlkit#148).  The
+  # updated `tomlkit` must be used by `makeRemoveSpecialDependenciesHook`
+  # inside `poetry2nix`, therefore just providing the updated version through
+  # our `nix/pyproject.toml` does not work, and using an overlay is required.
+  pythonOverlay = final: prev: {
+    python3 = prev.python3.override {
+      packageOverrides = self: super: {
+        tomlkit = super.tomlkit.overridePythonAttrs(old: rec {
+          version = "0.11.4";
+          src = super.fetchPypi {
+            inherit (old) pname;
+            inherit version;
+            sha256 = "sha256-MjWpAQ+uVDI+cnw6wG+3IHUv5mNbNCbjedrsYPvUSoM=";
+          };
+        });
+      };
+    };
+  };
 in
 # However, if you want to override Niv's inputs, this will let you do that.
-{ pkgs ? import sources.nixpkgs { }
+{ pkgs ? import sources.nixpkgs { overlays = [ pythonOverlay ]; }
 , poetry2nix ? pkgs.callPackage (import sources.poetry2nix) { }
 , avr ? true
 , arm ? true