diff --git a/.github/workflows/ci_steps.yml b/.github/workflows/ci_steps.yml
index 522583ac9..3cf4f17fd 100644
--- a/.github/workflows/ci_steps.yml
+++ b/.github/workflows/ci_steps.yml
@@ -90,7 +90,7 @@ jobs:
                 -DOPENEXR_RUN_FUZZ_TESTS='OFF' \
                 -DCMAKE_VERBOSE_MAKEFILE='ON'"
           echo "CMAKE_COMMAND=$CMAKE_COMMAND" >> $GITHUB_ENV
-          echo "INSTALL_MANIFEST=$(echo '_build/install_manifest.${{ inputs.os }}' | cut -d'-').${{ inputs.build }}.txt" >> $GITHUB_ENV
+          echo "INSTALL_MANIFEST=$(echo '_build/install_manifest.${{ inputs.os }}' | cut -d'-' -f1).${{ inputs.build }}.txt" >> $GITHUB_ENV
           echo 
         working-directory: _build
         shell: bash