diff --git a/t/tblite/tblite-0.2.1-intel-2020b.eb b/t/tblite/tblite-0.2.1-intel-2020b.eb
index 55e61b57..f1f3d23c 100644
--- a/t/tblite/tblite-0.2.1-intel-2020b.eb
+++ b/t/tblite/tblite-0.2.1-intel-2020b.eb
@@ -10,7 +10,10 @@ homepage = 'http://www.example.com'
 description = """This project is an effort to create a library implementation of the extended tight binding (xTB) Hamiltonian which can be shared between xtb and dftb+. The current state of this project should be considered as highly experimental."""
 
 toolchain = {'name': 'intel', 'version': '2020b'}
-toolchainopts = {'optarch': 'march=core-avx2'}
+
+import os
+if os.environ.get("CLUSTERNAME") in ["KAROLINA"]:
+    toolchainopts = {'optarch': 'march=core-avx2'}
 
 source_urls = ['https://github.com/tblite/tblite/archive/refs/tags/']
 sources = ['v%(version)s.tar.gz']