diff --git a/flake.nix b/flake.nix
index 3d2c6eb..a1de14a 100644
--- a/flake.nix
+++ b/flake.nix
@@ -31,6 +31,7 @@
           packages = with pkgs;
             [
               pkgsCross.arm-embedded.stdenv.cc
+              pkgsCross.arm-embedded.buildPackages.gdb
               segger-jlink
               clang-tools
               cmake