diff --git a/gpu-dawn/.github/workflows/ci.yml b/gpu-dawn/.github/workflows/ci.yml
index f8319554..3c66f062 100644
--- a/gpu-dawn/.github/workflows/ci.yml
+++ b/gpu-dawn/.github/workflows/ci.yml
@@ -5,39 +5,38 @@ on:
     types:
       - completed
 jobs:
-  # TODO(build-system): enable x86 Linux CI here, dependency cycle in build.zig
-  # x86_64-linux:
-  #   runs-on: ubuntu-latest
-  #   # We want to run on external PRs, but not on our own internal PRs as they'll be run by the push
-  #   # to the branch.
-  #   if: github.event.workflow_run.conclusion == 'success' && (github.event_name == 'push' || github.event.pull_request.head.repo.full_name != github.repository)
-  #   steps:
-  #     - name: Checkout
-  #       uses: actions/checkout@v2
-  #     - name: Setup Zig
-  #       run: |
-  #         sudo apt install xz-utils
-  #         sudo sh -c 'wget -c https://ziglang.org/builds/zig-linux-x86_64-0.10.0-dev.670+e1a535360.tar.xz -O - | tar -xJ --strip-components=1 -C /usr/local/bin'
-  #     - name: Clone mach-glfw
-  #       run: rm libs/mach-glfw && git clone https://github.com/hexops/mach-glfw libs/mach-glfw
-  #     - name: install (debug)
-  #       run: zig build install -Dfrom-source=true
-  #     - name: upload (debug)
-  #       run: |
-  #         mv zig-out/lib/libdawn.a zig-out/lib/libdawn_linux-x86_64_debug.a
-  #         gzip -9 zig-out/lib/libdawn_linux-x86_64_debug.a
-  #         gh release upload "release-$(git rev-parse --short HEAD)" zig-out/lib/libdawn_linux-x86_64_debug.a.gz
-  #       env:
-  #         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-  #     - name: install (release-fast)
-  #       run: zig build install -Dfrom-source=true -Drelease-fast=true
-  #     - name: upload (release-fast)
-  #       run: |
-  #         mv zig-out/lib/libdawn.a zig-out/lib/libdawn_linux-x86_64_release-fast.a
-  #         gzip -9 zig-out/lib/libdawn_linux-x86_64_release-fast.a
-  #         gh release upload "release-$(git rev-parse --short HEAD)" zig-out/lib/libdawn_linux-x86_64_release-fast.a.gz
-  #       env:
-  #         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+  x86_64-linux:
+    runs-on: ubuntu-latest
+    # We want to run on external PRs, but not on our own internal PRs as they'll be run by the push
+    # to the branch.
+    if: github.event.workflow_run.conclusion == 'success' && (github.event_name == 'push' || github.event.pull_request.head.repo.full_name != github.repository)
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Setup Zig
+        run: |
+          sudo apt install xz-utils
+          sudo sh -c 'wget -c https://ziglang.org/builds/zig-linux-x86_64-0.10.0-dev.670+e1a535360.tar.xz -O - | tar -xJ --strip-components=1 -C /usr/local/bin'
+      - name: Clone mach-glfw
+        run: rm libs/mach-glfw && git clone https://github.com/hexops/mach-glfw libs/mach-glfw
+      - name: install (debug)
+        run: zig build install -Dfrom-source=true
+      - name: upload (debug)
+        run: |
+          mv zig-out/lib/libdawn.a zig-out/lib/libdawn_linux-x86_64_debug.a
+          gzip -9 zig-out/lib/libdawn_linux-x86_64_debug.a
+          gh release upload "release-$(git rev-parse --short HEAD)" zig-out/lib/libdawn_linux-x86_64_debug.a.gz
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      - name: install (release-fast)
+        run: zig build install -Dfrom-source=true -Drelease-fast=true
+      - name: upload (release-fast)
+        run: |
+          mv zig-out/lib/libdawn.a zig-out/lib/libdawn_linux-x86_64_release-fast.a
+          gzip -9 zig-out/lib/libdawn_linux-x86_64_release-fast.a
+          gh release upload "release-$(git rev-parse --short HEAD)" zig-out/lib/libdawn_linux-x86_64_release-fast.a.gz
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
   # TODO(build-system): enable windows CI here once gpu-dawn builds under Windows
   # x86_64-windows:
   #   runs-on: windows-latest