diff --git a/bsc/llvm-ompss2/clang.nix b/bsc/llvm-ompss2/clang.nix
index 4caabc1..0e0f215 100644
--- a/bsc/llvm-ompss2/clang.nix
+++ b/bsc/llvm-ompss2/clang.nix
@@ -41,6 +41,7 @@ stdenv.mkDerivation rec {
   cmakeBuildType = if enableDebug then "Debug" else "Release";
 
   dontUseCmakeBuildDir = true;
+  enableAssertions = "OFF";
 
   preConfigure = ''
     mkdir -p build
@@ -52,7 +53,7 @@ stdenv.mkDerivation rec {
       "-DCMAKE_EXE_LINKER_FLAGS_DEBUG=-Wl,-gdb-index"
       "-DLLVM_LIT_ARGS=-sv --xunit-xml-output=xunit.xml"
       "-DLLVM_ENABLE_PROJECTS=clang;openmp;compiler-rt"
-      "-DLLVM_ENABLE_ASSERTIONS=ON"
+      "-DLLVM_ENABLE_ASSERTIONS=${enableAssertions}"
       "-DLLVM_INSTALL_TOOLCHAIN_ONLY=ON"
     )
   '';