diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4cab23951..7ff704606 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -469,21 +469,21 @@ jobs:
       fail-fast: false
       matrix:
         include:
-        - version: 18
+        - version: 17  # not yet passing with clang 18.1.3
           cross: riscv64+rvv_vlen128_elen64
           arch_gnu: riscv64
           arch_deb: riscv64
-          distro: ubuntu-24.04
-        - version: 18
+          distro: ubuntu-22.04
+        - version: 17  # not yet passing with clang 18.1.3
           cross: riscv64+rvv_vlen256_elen64
           arch_gnu: riscv64
           arch_deb: riscv64
-          distro: ubuntu-24.04
-        - version: 18
+          distro: ubuntu-22.04
+        - version: 17  # not yet passing with clang 18.1.3
           cross: riscv64+rvv_vlen512_elen64
           arch_gnu: riscv64
           arch_deb: riscv64
-          distro: ubuntu-24.04
+          distro: ubuntu-22.04
         - version: 18
           cross: riscv64+rvv_vlen128_elen64_zvfh
           arch_gnu: riscv64