diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d8f8c1c..1edac2f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -64,6 +64,12 @@
             "ubuntu-latest",
             "macos-latest"
           ],
+          "exclude": [
+            {
+              "os": "macos-latest",
+              "lisp": "ccl-bin"
+            }
+          ],
           "quicklisp": [
             "ultralisp",
             "quicklisp"
diff --git a/src/ci.lisp b/src/ci.lisp
index f1d4f1a..f652e12 100644
--- a/src/ci.lisp
+++ b/src/ci.lisp
@@ -25,6 +25,9 @@
           :lisp ("sbcl-bin"
                  "ccl-bin"
                  "ecl")
+          :exclude '((:os "macos-latest"
+                      ;; Not supported platform arm64.
+                      :lisp "ccl-bin"))
           :coverage t)))