diff --git a/var/spack/repos/spack_repo/builtin/packages/libmng/package.py b/var/spack/repos/spack_repo/builtin/packages/libmng/package.py
index ef3242cca9f..0b6c22ea679 100644
--- a/var/spack/repos/spack_repo/builtin/packages/libmng/package.py
+++ b/var/spack/repos/spack_repo/builtin/packages/libmng/package.py
@@ -2,7 +2,6 @@
 #
 # SPDX-License-Identifier: (Apache-2.0 OR MIT)
 
-import spack.build_systems
 import spack.build_systems.autotools
 import spack.build_systems.cmake
 from spack.package import *
diff --git a/var/spack/repos/spack_repo/builtin/packages/libuv/package.py b/var/spack/repos/spack_repo/builtin/packages/libuv/package.py
index ef0a7c09256..093896d9c95 100644
--- a/var/spack/repos/spack_repo/builtin/packages/libuv/package.py
+++ b/var/spack/repos/spack_repo/builtin/packages/libuv/package.py
@@ -3,7 +3,6 @@
 # SPDX-License-Identifier: (Apache-2.0 OR MIT)
 import sys
 
-import spack.build_systems
 import spack.build_systems.autotools
 from spack.package import *
 
diff --git a/var/spack/repos/spack_repo/builtin/packages/sccache/package.py b/var/spack/repos/spack_repo/builtin/packages/sccache/package.py
index 438040f51bf..6037b26e5bf 100644
--- a/var/spack/repos/spack_repo/builtin/packages/sccache/package.py
+++ b/var/spack/repos/spack_repo/builtin/packages/sccache/package.py
@@ -5,7 +5,6 @@
 import os
 import re
 
-import spack.build_systems
 import spack.build_systems.cargo
 from spack.package import *