git-annex: skip test requiring unavailable tool on darwin

pkgs/development/haskell-modules/configuration-darwin.nix

@@ -82,6 +82,17 @@ self: super: ({
   # the system-fileio tests use canonicalizePath, which fails in the sandbox
   system-fileio = dontCheck super.system-fileio;
 
+  git-annex = overrideCabal (drv: {
+    # We can't use testFlags since git-annex side steps the Cabal test mechanism
+    preCheck = drv.preCheck or "" + ''
+      checkFlagsArray+=(
+        # The addurl test cases require security(1) to be in PATH which we can't
+        # provide from nixpkgs to my (@sternenseemann) knowledge.
+        "-p" "!/addurl/"
+      )
+    '';
+  }) super.git-annex;
+
   # Prevents needing to add `security_tool` as a run-time dependency for
   # everything using x509-system to give access to the `security` executable.
   #