diff --git a/pyproject.toml b/pyproject.toml
index 505c6c8..73455bf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -29,7 +29,7 @@ build-verbosity = 1
 build-frontend = "build"
 archs = "auto64"
 skip = "*musllinux*" # doesn't find LLVM musl build
-environment = { SKBUILD_CMAKE_ARGS="-DLLVM_DIR={project}/llvm-build/lib/cmake/llvm"}
+environment = { SKBUILD_CMAKE_ARGS="-DLLVM_DIR=$(pwd)/llvm-build/lib/cmake/llvm"}
 before-all = "bash ./scripts/action/build_llvm.sh"
 before-build = "pwd"