diff --git a/lib/spack/spack/cmd/dev_build.py b/lib/spack/spack/cmd/dev_build.py
index e3598d57a3c..c728cee3f7b 100644
--- a/lib/spack/spack/cmd/dev_build.py
+++ b/lib/spack/spack/cmd/dev_build.py
@@ -8,13 +8,12 @@
 
 import llnl.util.tty as tty
 
-import spack.build_environment
 import spack.cmd
 import spack.cmd.common.arguments
 import spack.config
 import spack.environment as ev
-import spack.prompt
 import spack.repo
+import spack.version
 from spack.cmd.common import arguments
 from spack.cmd.common.env_utility import run_command_in_subshell
 from spack.context import Context