diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index aac3081e2..16f32107b 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -26,11 +26,23 @@ jobs:
           python-version: '3.9'
       - name: Install dependencies
         run: |
-          python -m pip install --upgrade meson PyYAML
           sudo apt update
           sudo apt install -y \
-            doxygen libxcb-xkb-dev valgrind ninja-build \
-            libwayland-dev wayland-protocols bison graphviz
+            doxygen libxcb-xkb-dev valgrind ninja-build meson \
+            libwayland-dev wayland-protocols bison graphviz curl
+          python -m pip install --upgrade PyYAML
+      - name: Install xkeyboard-config
+        run: |
+          # HACK: Force xkeyboard-config version
+          pushd ~
+          XKC_VER=2.39
+          curl -O "https://www.x.org/releases/individual/data/xkeyboard-config/xkeyboard-config-$XKC_VER.tar.xz"
+          tar -xf "xkeyboard-config-$XKC_VER.tar.xz"
+          cd "xkeyboard-config-$XKC_VER"
+          BUILDDIR=build
+          meson setup $BUILDDIR -Dprefix=/usr
+          sudo meson install -C $BUILDDIR
+          popd
       - name: Setup
         run: |
           # -gdwarf-4 - see https://github.com/llvm/llvm-project/issues/56550.
diff --git a/test/x11comp.c b/test/x11comp.c
index 5fd064b36..f4ba7888a 100644
--- a/test/x11comp.c
+++ b/test/x11comp.c
@@ -56,7 +56,7 @@ main(void)
     pid_t xkbcomp_pid;
 
     char *xhost = NULL;
-    int xdpy_current;
+    int xdpy_current = 0;
     int xdpy_candidate;
 
     /*
@@ -71,8 +71,9 @@ main(void)
      * 6. Kill the server & clean up.
      */
 
+    // NOTE: it is OK if it fails.
     ret = xcb_parse_display(NULL, &xhost, &xdpy_current, NULL);
-    assert(ret != 0);
+
     /*
      * IANA assigns TCP port numbers from 6000 through 6063 to X11
      * clients.  In addition, the current XCB implementaion shows
@@ -85,7 +86,9 @@ main(void)
         if (xdpy_candidate == xdpy_current) {
             continue;
         }
-        snprintf(display, sizeof(display), "%s:%d", xhost, xdpy_candidate);
+        snprintf(display, sizeof(display),
+                 "%s:%d", (xhost != NULL) ? xhost : "",
+                 xdpy_candidate);
         ret = posix_spawnp(&xvfb_pid, "Xvfb", NULL, NULL, xvfb_argv, envp);
         if (ret == 0) {
             break;