diff --git a/shenvs/armasm.nix b/shenvs/armasm.nix
index f8a0179..195f6e6 100644
--- a/shenvs/armasm.nix
+++ b/shenvs/armasm.nix
@@ -2,6 +2,7 @@ pkgs: {
   paths = with pkgs; [
     gcc-arm-embedded
     gnumake
+    openocd
     qemu
   ];
 }