diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 717dea2..7912916 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -40,13 +40,8 @@ jobs:
         with:
           persist-credentials: false
 
-      - name: Install Determinate Nix
-        uses: DeterminateSystems/determinate-nix-action@d96678350ffd6a456235832eb11e1c491589b7bb # v3.21.8
-        with:
-          extra-conf: lazy-trees = true
-
-      - name: Set up FlakeHub Cache
-        uses: DeterminateSystems/flakehub-cache-action@77c6bddd7d747943530aaa578c57f233ee5d920e # v3.21.8
+      - name: Install Nix
+        uses: nixbuild/nix-quick-install-action@9f63be77f412a248c9d9a65a4c82cf066cdf8f0c # v35
 
       - name: Install Rust (${{ matrix.toolchain.name }})
         uses: actions-rust-lang/setup-rust-toolchain@166cdcfd11aee3cb47222f9ddb555ce30ddb9659 # v1.17.0
@@ -55,6 +50,8 @@ jobs:
 
       - name: Enter Nix Devshell
         uses: nicknovitski/nix-develop@9be7cfb4b10451d3390a75dc18ad0465bed4932a # v1.2.1
+        with:
+          arguments: .#ci
 
       - name: Workaround MSRV issues
         if: matrix.toolchain.name == 'msrv'
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 08fbeb4..b3a4459 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -33,19 +33,15 @@ jobs:
           GITHUB_TOKEN: ${{ github.token }}
           CARGO_REGISTRY_TOKEN: ${{ steps.auth.outputs.token }}
 
-      - name: Install Determinate Nix
+      - name: Install Nix
         if: ${{ steps.release-plz.outputs.prs_created == 'true' || steps.release-plz.outputs.releases_created == 'true' }}
-        uses: DeterminateSystems/determinate-nix-action@d96678350ffd6a456235832eb11e1c491589b7bb # v3.21.8
-        with:
-          extra-conf: lazy-trees = true
-
-      - name: Set up FlakeHub Cache
-        if: ${{ steps.release-plz.outputs.prs_created == 'true' || steps.release-plz.outputs.releases_created == 'true' }}
-        uses: DeterminateSystems/flakehub-cache-action@77c6bddd7d747943530aaa578c57f233ee5d920e # v3.21.8
+        uses: nixbuild/nix-quick-install-action@9f63be77f412a248c9d9a65a4c82cf066cdf8f0c # v35
 
       - name: Enter Nix devshell
         if: ${{ steps.release-plz.outputs.prs_created == 'true' || steps.release-plz.outputs.releases_created == 'true' }}
         uses: nicknovitski/nix-develop@9be7cfb4b10451d3390a75dc18ad0465bed4932a # v1.2.1
+        with:
+          arguments: .#ci-release
 
       - name: Bump changelog versions
         if: ${{ steps.release-plz.outputs.prs_created == 'true' }}
diff --git a/flake.nix b/flake.nix
index 8cebdfe..81d365a 100644
--- a/flake.nix
+++ b/flake.nix
@@ -17,6 +17,15 @@
       perSystem = { pkgs, config, inputs', system, lib, ... }: {
         formatter = pkgs.nixpkgs-fmt;
 
+        devShells.ci = pkgs.mkShell {
+          packages = [ pkgs.cargo-nextest pkgs.just ];
+          shellHook = config.x52.justRust.shellHook;
+        };
+
+        devShells.ci-release = pkgs.mkShell {
+          packages = [ inputs'.x52.packages.x52-release-tools ];
+        };
+
         devShells.default = pkgs.mkShell {
           packages = [
             config.formatter