ci: Use different workaround for Archlinux docker

.github/workflows/docker.yml

@@ -16,6 +16,13 @@ jobs:
           - archlinux-webengine
           - archlinux-webengine-unstable
     steps:
+      - name: Build latest runc to work around actions/virtual-environments#2698
+        run: |
+          sudo apt-get install libseccomp-dev
+          git clone https://github.com/opencontainers/runc
+          cd runc
+          make
+          sudo make install
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
         with:

scripts/dev/ci/docker/Dockerfile.j2

@@ -1,12 +1,5 @@
 FROM archlinux:latest
 
-# WORKAROUND for glibc 2.33 and old Docker
-# See https://github.com/actions/virtual-environments/issues/2658
-# Thanks to https://github.com/lxqt/lxqt-panel/pull/1562
-RUN patched_glibc=glibc-linux4-2.33-4-x86_64.pkg.tar.zst && \
-    curl -LO "https://repo.archlinuxcn.org/x86_64/$patched_glibc" && \
-    bsdtar -C / -xvf "$patched_glibc"
-
 {% if unstable %}
 RUN sed -i '/^# after the header/a[kde-unstable]\nInclude = /etc/pacman.d/mirrorlist\n\n[testing]\nInclude = /etc/pacman.d/mirrorlist' /etc/pacman.conf
 {% endif %}