diff --git a/pkgs/tools/package-management/nix/default.nix b/pkgs/tools/package-management/nix/default.nix
index 780a302bcd63..f3ecc39f3378 100644
--- a/pkgs/tools/package-management/nix/default.nix
+++ b/pkgs/tools/package-management/nix/default.nix
@@ -88,6 +88,14 @@ in lib.makeExtensible (self: {
   nix_2_9 = common {
     version = "2.9.0";
     sha256 = "sha256-W6aTsTpCTb+vXQEXDjnKqetOuJmEfSuK2CXvAMqwo74=";
+    patches = [
+      # can be removed when updated to 2.9.1
+      (fetchpatch {
+        name = "fix-segfault-in-git-fetcher";
+        url = "https://github.com/NixOS/nix/commit/bc4759345538c89e1f045aaabcc0cafe4ecca12a.patch";
+        sha256 = "sha256-UrfH4M7a02yfE9X3tA1Pwhw4RacBW+rShYkl7ybG64I=";
+      })
+    ];
   };
 
   stable = self.nix_2_9;