diff --git a/nix/pkgs/default.nix b/nix/pkgs/default.nix
index fb1663c19cba..7b2167e74f79 100644
--- a/nix/pkgs/default.nix
+++ b/nix/pkgs/default.nix
@@ -35,6 +35,7 @@ stdenv.mkDerivation {
     libtool
     lowdown
     pkgconf
+    protobuf
     py3
     unzip
     which
@@ -52,6 +53,7 @@ stdenv.mkDerivation {
     gmp
     jq
     libsodium
+    openssl
     sqlite
     zlib
   ];
diff --git a/nix/shells.nix b/nix/shells.nix
index bb3588c28b3a..9ca4052fa79a 100644
--- a/nix/shells.nix
+++ b/nix/shells.nix
@@ -9,7 +9,18 @@
     }:
     {
       devShells = {
-        default = pkgs.mkShell { inputsFrom = [ config.packages.default ]; };
+        default = pkgs.mkShell {
+          inputsFrom = [ config.packages.default ];
+          buildInputs = [
+            pkgs.stdenv.cc.cc.lib
+            pkgs.uv
+          ];
+          # this fixes the following error when running uv pytest tests/:
+          #   ImportError: libstdc++.so.6: cannot open shared object file: No such file or directory
+          shellHook = ''
+            export LD_LIBRARY_PATH="${pkgs.stdenv.cc.cc.lib}/lib''${LD_LIBRARY_PATH:+:}$LD_LIBRARY_PATH"
+          '';
+        };
         postgres = pkgs.mkShell { inputsFrom = [ config.packages.cln-postgres ]; };
         rust = pkgs.craneLib.devShell {
           checks = {