diff --git a/.github/workflows/deploy-docs.yml b/.github/workflows/deploy-docs.yml
index 2903e409..f073e394 100644
--- a/.github/workflows/deploy-docs.yml
+++ b/.github/workflows/deploy-docs.yml
@@ -37,10 +37,13 @@ jobs:
           lfs: true
           ref: ${{ inputs.revision || github.ref }}
 
-      - uses: cachix/install-nix-action@v30
+      - uses: Gr1N/setup-poetry@v9
+
+      - name: Setup Python
+        uses: actions/setup-python@v5
         with:
-          github_access_token: ${{ secrets.GITHUB_TOKEN }}
-          install_url: https://releases.nixos.org/nix/nix-2.24.11/install
+          python-version: '3.12'
+          cache: poetry
 
       - name: Get source
         uses: ./.github/actions/get-src
@@ -48,15 +51,23 @@ jobs:
           load_submodules: "true"
           third_party: "none"
 
-      - name: Build
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '22'
+
+      - name: Install dependencies
         run: |
-          nix develop ./build-scripts/devenv#docs --command bash -c '
+          npm install -g @mermaid-js/mermaid-cli@11.6.0 && \
+          python3.12 -m pip install poetry && \
             pushd doc/website/ && \
             poetry install --no-root && \
-            popd && \
-            ruby ./tools/ya-build/ya-build config && \
-            ninja -v -C build genvm/docs
-          '
+            popd
+
+      - name: Build
+        run: |
+          ./tools/ya-build/ya-build config
+          ninja -v -C build genvm/docs
 
       - name: Checkout target repository
         uses: actions/checkout@v4
diff --git a/build-scripts/devenv/flake.nix b/build-scripts/devenv/flake.nix
index bd171827..90dba625 100644
--- a/build-scripts/devenv/flake.nix
+++ b/build-scripts/devenv/flake.nix
@@ -55,27 +55,6 @@
 							export LD_LIBRARY_PATH="${toString pkgs.xz.out}/lib:${toString pkgs.zlib.out}/lib:${toString pkgs.stdenv.cc.cc.lib}/lib:${toString pkgs.glibc}/lib:$LD_LIBRARY_PATH"
 						'';
 					};
-
-					devShells.docs = pkgs.mkShell {
-						packages = with pkgs; [
-							python312
-							poetry
-
-							ninja
-							ruby
-
-							xz
-							zlib
-							glibc
-
-							mermaid-cli
-						];
-
-						shellHook = ''
-							export PATH="$(pwd)/tools/ya-build:$(pwd)/tools/git-third-party:$PATH"
-							export LD_LIBRARY_PATH="${toString pkgs.xz.out}/lib:${toString pkgs.zlib.out}/lib:${toString pkgs.glibc}/lib:$LD_LIBRARY_PATH"
-						'';
-					};
 				}
 			);
 }
diff --git a/build-scripts/ya-build-plugins/src/webget.rb b/build-scripts/ya-build-plugins/src/webget.rb
index 87869fa3..b35f849f 100644
--- a/build-scripts/ya-build-plugins/src/webget.rb
+++ b/build-scripts/ya-build-plugins/src/webget.rb
@@ -35,7 +35,7 @@ def extract_tar(base_dir, path, trim_first: true)
 	if path.to_s.end_with?('.xz')
 		require 'rubygems/package'
 		begin
-			Gem::Specification::find_by_name('ruby-xz')
+			Gem::Specification::find_by_name('ruby-xz', '1.0.3')
 		rescue Gem::LoadError
 			require 'rubygems/commands/install_command'
 			cmd = Gem::Commands::InstallCommand.new