diff --git a/flake.nix b/flake.nix
index 19e604b..33681c1 100644
--- a/flake.nix
+++ b/flake.nix
@@ -111,6 +111,10 @@
             tmuxbash = super.callPackage ./pkgs/tmuxbash.nix { };
             gcloud-wrapped = super.callPackage ./pkgs/gcloud-wrapped { };
           }
+          // super.lib.optionalAttrs super.stdenv.isDarwin {
+            # fish gets SIGKILL in nix sandbox on darwin, breaking direnv tests
+            direnv = super.direnv.overrideAttrs { doCheck = false; };
+          }
           // super.lib.optionalAttrs super.stdenv.isLinux rec {
             nicer = super.callPackage ./pkgs/nicer.nix { };
             go-raceless = super.callPackage ./pkgs/go-raceless { inherit (nicer) ; };
diff --git a/modules/profiles/devtools/default.nix b/modules/profiles/devtools/default.nix
index 4a58c35..1596f2b 100644
--- a/modules/profiles/devtools/default.nix
+++ b/modules/profiles/devtools/default.nix
@@ -1,4 +1,8 @@
-{ config, pkgs, ... }:
+{
+  config,
+  pkgs,
+  ...
+}:
 {
   home-manager.users.${config.mj.username} = {
     imports = [ ../../../shared/home/dev.nix ];
@@ -29,15 +33,26 @@
     git-filter-repo
     pkgs.pkgs-unstable.claude-code
 
-    (python3.withPackages (
-      ps: with ps; [
-        numpy
-        pyyaml
-        plotly
-        ipython
-        pymodbus
-        matplotlib
-      ]
-    ))
+    (
+      let
+        py = python3.override {
+          packageOverrides = _: pyPrev: {
+            # ffmpeg/fish get SIGKILL in nix sandbox on darwin
+            imageio-ffmpeg = pyPrev.imageio-ffmpeg.overridePythonAttrs { doCheck = false; };
+            imageio = pyPrev.imageio.overridePythonAttrs { doCheck = false; };
+          };
+        };
+      in
+      py.withPackages (
+        ps: with ps; [
+          numpy
+          pyyaml
+          plotly
+          ipython
+          pymodbus
+          matplotlib
+        ]
+      )
+    )
   ];
 }