diff --git a/var/spack/repos/builtin/packages/swiftsim/package.py b/var/spack/repos/builtin/packages/swiftsim/package.py
index cc0ff0e452f..cc1834818e5 100644
--- a/var/spack/repos/builtin/packages/swiftsim/package.py
+++ b/var/spack/repos/builtin/packages/swiftsim/package.py
@@ -25,7 +25,6 @@
 
 from spack import *
 
-import spack.environment
 import llnl.util.tty as tty