diff --git a/crates/icepick/build.rs b/crates/icepick/build.rs
index d508a9b..10c2450 100644
--- a/crates/icepick/build.rs
+++ b/crates/icepick/build.rs
@@ -1,7 +1,5 @@
 use icepick_workflow::Workflow;
-use std::{collections::HashMap, path::{PathBuf, Path}};
-use smex;
-use bincode;
+use std::{collections::BTreeMap, path::{PathBuf, Path}};
 
 fn env_var(var: &'static str) -> String {
     println!("cargo::rerun-if-env-changed={var}");
@@ -18,7 +16,7 @@ fn main() {
     let workflows_dir = PathBuf::from(crate_dir).join("workflows");
     track_path(&workflows_dir);
 
-    let mut workflows_by_module: HashMap<String, Vec<Workflow>> = Default::default();
+    let mut workflows_by_module: BTreeMap<String, Vec<Workflow>> = Default::default();
 
     for module_dir in std::fs::read_dir(&workflows_dir).unwrap() {
         let module_dir = module_dir.unwrap();