diff --git a/.circleci/install-mlir.sh b/.circleci/install-mlir.sh
index ed7f2b8..fcc6ba6 100644
--- a/.circleci/install-mlir.sh
+++ b/.circleci/install-mlir.sh
@@ -9,5 +9,5 @@ cmake -G Ninja ../llvm \
    -DLLVM_ENABLE_ASSERTIONS=ON \
    -DLLVM_ENABLE_RTTI=ON
 
-export MAKEFLAGS=-j4
+export MAKEFLAGS='-j4'
 cmake --build . --target check-mlir
\ No newline at end of file