diff --git a/pkgs/by-name/tm/tmc-cli/package.nix b/pkgs/by-name/tm/tmc-cli/package.nix
index 03ec3a00e500..21d407b6729a 100644
--- a/pkgs/by-name/tm/tmc-cli/package.nix
+++ b/pkgs/by-name/tm/tmc-cli/package.nix
@@ -1,5 +1,6 @@
 {
   lib,
+  stdenv,
   fetchFromGitHub,
   rustPlatform,
   writableTmpDirAsHomeHook,
@@ -23,6 +24,16 @@ rustPlatform.buildRustPackage (finalAttrs: {
     writableTmpDirAsHomeHook
   ];
 
+  checkFlags = lib.optionals stdenv.hostPlatform.isDarwin [
+    # When sandboxing, "Attempted to create a NULL object."
+    # https://github.com/mullvad/system-configuration-rs/pull/59 may fix.
+    "--skip=commands::courses::tests::list_courses_with_client_test"
+    # Same
+    "--skip=all_integration_tests"
+    # When sandboxing, "Lazy instance has previously been poisoned."
+    "--skip=commands::exercises::tests::list_exercises_with_client_test"
+  ];
+
   nativeInstallCheckInputs = [
     versionCheckHook
   ];
@@ -30,6 +41,8 @@ rustPlatform.buildRustPackage (finalAttrs: {
   versionCheckProgram = "${placeholder "out"}/bin/${finalAttrs.meta.mainProgram}";
   versionCheckProgramArg = "--version";
 
+  __darwinAllowLocalNetworking = true;
+
   meta = {
     description = "CLI for using the TestMyCode programming assignment evaluator";
     homepage = "https://github.com/rage/tmc-cli-rust";