diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0ec37345..b5d21d40 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -215,7 +215,7 @@ jobs:
         env:
           CIBW_SKIP: cp36-* cp37-* pp36-* pp37-* pp38-* cp38-* *p39-*_aarch64 *p310-*_aarch64 pp*_aarch64 *musllinux*
           CIBW_BEFORE_ALL_LINUX: apt install -y gcc || yum install -y gcc || apk add gcc
-          CIBW_ARCHS_LINUX: ${matrix.os == ubuntu-24.04-arm && 'aarch64' || 'auto'}
+          CIBW_ARCHS_LINUX: ${{ matrix.os == 'ubuntu-24.04-arm' && 'aarch64' || 'auto' }}
           CIBW_BUILD_VERBOSITY: 3
           REQUIRE_CYTHON: 1
 
@@ -226,7 +226,7 @@ jobs:
         env:
           CIBW_SKIP: cp36-* cp37-* pp36-* pp37-* pp38-* cp38-* *p39-*_aarch64 *p310-*_aarch64 pp*_aarch64 *manylinux*
           CIBW_BEFORE_ALL_LINUX: apt install -y gcc || yum install -y gcc || apk add gcc
-          CIBW_ARCHS_LINUX: ${matrix.os == ubuntu-24.04-arm && 'aarch64' || 'auto'}
+          CIBW_ARCHS_LINUX: ${{ matrix.os == 'ubuntu-24.04-arm' && 'aarch64' || 'auto' }}
           CIBW_BUILD_VERBOSITY: 3
           REQUIRE_CYTHON: 1