diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 2a38795..26857ca 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -12,7 +12,7 @@ jobs:
         #os: [ ubuntu-latest, macos-latest ]
         nix-install-url:
           - https://nixos.org/nix/install
-          - https://github.com/numtide/nix-flakes-installer/releases/download/nix-2.4pre20201221_9fab14a/install
+          - https://github.com/numtide/nix-flakes-installer/releases/download/nix-2.4pre20210126_f15f0b8/install
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v2