Fixup: next attempt to forward LLVM_VERSION to cibuildwheel env

Author: ggeorgakoudis

pyproject.toml

@@ -46,6 +46,8 @@ local_scheme = "no-local-version"
 
 [tool.cibuildwheel]
 archs = ["native"]
+# Pass LLVM_VERSION from the host environment to cibuildwheel.
+environment-pass = ["LLVM_VERSION"]
 # We use miniconda3 to get the clang/llvm toolchain on Linux.
 before-all = ["bash buildscripts/cibuildwheel/setup-miniconda3.sh"]
 before-build = ["rm -rf build dist src/*.egg-info"]
@@ -64,7 +66,6 @@ before-all = [
 ]
 
 [tool.cibuildwheel.environment]
-LLVM_VERSION = "${LLVM_VERSION}"
 LLVM_DIR = "_stage/miniconda3/envs/llvmdev-${LLVM_VERSION}"
 CLANG_TOOL = "_stage/miniconda3/envs/clang-${LLVM_VERSION}/bin/clang"
 USE_CXX11_ABI = "1"