diff --git a/environment.ts b/environment.ts
index 5a5999b..3aa5f03 100644
--- a/environment.ts
+++ b/environment.ts
@@ -8,7 +8,7 @@ export const LLVM_SRC = path.join(SW_AUTOVEC, "swllvm-13.0.0-vect0919")
 export const LLVM_INSTALL = path.join(LLVM_SRC, "local", "installed")
 
 /// Default toolchain version used in SPEC2017
-export const PREFIX = path.join(LLVM_SRC, "85e4fed0c9e4cd4ab8bce89f307127ccbad31294")
+export const PREFIX = path.join(LLVM_INSTALL, "85e4fed0c9e4cd4ab8bce89f307127ccbad31294")
 export const PREFIXBIN = path.join(PREFIX, "bin")
 export const LLVM_EXTRACT = path.join(PREFIXBIN, "llvm-extract")