diff --git a/opam-repo-ci-api.opam b/opam-repo-ci-api.opam
index 9cc6a9be..da9b2bc6 100644
--- a/opam-repo-ci-api.opam
+++ b/opam-repo-ci-api.opam
@@ -36,3 +36,5 @@ build: [
   ]
 ]
 dev-repo: "git+https://github.com/ocurrent/opam-repo-ci.git"
+# See https://github.com/ocurrent/ocaml-ci/issues/931
+available: !(os-distribution = "debian" & os-version = "12" & arch = "x86_32")
diff --git a/opam-repo-ci-api.opam.template b/opam-repo-ci-api.opam.template
new file mode 100644
index 00000000..c664ab3f
--- /dev/null
+++ b/opam-repo-ci-api.opam.template
@@ -0,0 +1,2 @@
+# See https://github.com/ocurrent/ocaml-ci/issues/931
+available: !(os-distribution = "debian" & os-version = "12" & arch = "x86_32")
diff --git a/opam-repo-ci-client.opam b/opam-repo-ci-client.opam
index f2083876..d4950888 100644
--- a/opam-repo-ci-client.opam
+++ b/opam-repo-ci-client.opam
@@ -38,3 +38,5 @@ build: [
   ]
 ]
 dev-repo: "git+https://github.com/ocurrent/opam-repo-ci.git"
+# See https://github.com/ocurrent/ocaml-ci/issues/931
+available: !(os-distribution = "debian" & os-version = "12" & arch = "x86_32")
diff --git a/opam-repo-ci-client.opam.template b/opam-repo-ci-client.opam.template
new file mode 100644
index 00000000..c664ab3f
--- /dev/null
+++ b/opam-repo-ci-client.opam.template
@@ -0,0 +1,2 @@
+# See https://github.com/ocurrent/ocaml-ci/issues/931
+available: !(os-distribution = "debian" & os-version = "12" & arch = "x86_32")
diff --git a/opam-repo-ci-service.opam b/opam-repo-ci-service.opam
index 001ebdb6..71688164 100644
--- a/opam-repo-ci-service.opam
+++ b/opam-repo-ci-service.opam
@@ -64,3 +64,5 @@ build: [
   ]
 ]
 dev-repo: "git+https://github.com/ocurrent/opam-repo-ci.git"
+# See https://github.com/ocurrent/ocaml-ci/issues/931
+available: !(os-distribution = "debian" & os-version = "12" & arch = "x86_32")
diff --git a/opam-repo-ci-service.opam.template b/opam-repo-ci-service.opam.template
new file mode 100644
index 00000000..c664ab3f
--- /dev/null
+++ b/opam-repo-ci-service.opam.template
@@ -0,0 +1,2 @@
+# See https://github.com/ocurrent/ocaml-ci/issues/931
+available: !(os-distribution = "debian" & os-version = "12" & arch = "x86_32")
diff --git a/opam-repo-ci-web.opam b/opam-repo-ci-web.opam
index c1ea5741..93b0c221 100644
--- a/opam-repo-ci-web.opam
+++ b/opam-repo-ci-web.opam
@@ -55,3 +55,5 @@ build: [
   ]
 ]
 dev-repo: "git+https://github.com/ocurrent/opam-repo-ci.git"
+# See https://github.com/ocurrent/ocaml-ci/issues/931
+available: !(os-distribution = "debian" & os-version = "12" & arch = "x86_32")
diff --git a/opam-repo-ci-web.opam.template b/opam-repo-ci-web.opam.template
new file mode 100644
index 00000000..c664ab3f
--- /dev/null
+++ b/opam-repo-ci-web.opam.template
@@ -0,0 +1,2 @@
+# See https://github.com/ocurrent/ocaml-ci/issues/931
+available: !(os-distribution = "debian" & os-version = "12" & arch = "x86_32")