diff --git a/scripts/build-circt-from-source.sh b/scripts/build-circt-from-source.sh
index 55370536..f9bb727e 100755
--- a/scripts/build-circt-from-source.sh
+++ b/scripts/build-circt-from-source.sh
@@ -68,7 +68,7 @@ echo "Building CIRCT's LLVM/MLIR"
 	  -DLLVM_ENABLE_PROJECTS="mlir" \
 	  -DLLVM_TARGETS_TO_BUILD="host" \
 	  -DLLVM_ENABLE_ASSERTIONS=ON \
-	  -DCMAKE_BUILD_TYPE=DEBUG \
+	  -DCMAKE_BUILD_TYPE=RELEASE \
 	  -DCMAKE_EXPORT_COMPILE_COMMANDS=ON
     ninja
 )
@@ -83,8 +83,7 @@ echo "Building CIRCT"
 	  -DMLIR_DIR=../llvm/build/lib/cmake/mlir \
 	  -DLLVM_DIR=../llvm/build/lib/cmake/llvm \
 	  -DLLVM_ENABLE_ASSERTIONS=ON \
-	  -DCMAKE_BUILD_TYPE=DEBUG \
-	  -DCMAKE_EXPORT_COMPILE_COMMANDS=ON \
+	  -DCMAKE_BUILD_TYPE=RELEASE \
 	  -DCMAKE_INSTALL_PREFIX=$PREFIX
     ninja
 )