diff --git a/crates/fj-kernel/src/operations/build/cycle.rs b/crates/fj-kernel/src/operations/build/cycle.rs
index ffb76f516..2e97cf50d 100644
--- a/crates/fj-kernel/src/operations/build/cycle.rs
+++ b/crates/fj-kernel/src/operations/build/cycle.rs
@@ -3,12 +3,10 @@ use itertools::Itertools;
 
 use crate::{
     objects::{Cycle, HalfEdge},
-    operations::Insert,
+    operations::{BuildHalfEdge, Insert},
     services::Services,
 };
 
-use super::BuildHalfEdge;
-
 /// Build a [`Cycle`]
 pub trait BuildCycle {
     /// Build an empty cycle
diff --git a/crates/fj-kernel/src/operations/build/face.rs b/crates/fj-kernel/src/operations/build/face.rs
index 76e12f18d..4146367a2 100644
--- a/crates/fj-kernel/src/operations/build/face.rs
+++ b/crates/fj-kernel/src/operations/build/face.rs
@@ -3,13 +3,14 @@ use fj_math::Point;
 
 use crate::{
     objects::{Cycle, Face, HalfEdge, Surface, Vertex},
-    operations::{Insert, IsInserted, IsInsertedNo},
+    operations::{
+        BuildCycle, BuildHalfEdge, BuildSurface, Insert, IsInserted,
+        IsInsertedNo,
+    },
     services::Services,
     storage::Handle,
 };
 
-use super::{BuildCycle, BuildHalfEdge, BuildSurface};
-
 /// Build a [`Face`]
 pub trait BuildFace {
     /// Build a face with an empty exterior, no interiors, and no color
diff --git a/crates/fj-kernel/src/operations/build/shell.rs b/crates/fj-kernel/src/operations/build/shell.rs
index 41ed095af..83aeed52e 100644
--- a/crates/fj-kernel/src/operations/build/shell.rs
+++ b/crates/fj-kernel/src/operations/build/shell.rs
@@ -3,13 +3,12 @@ use fj_math::Point;
 use crate::{
     objects::{Face, Shell},
     operations::{
-        Insert, IsInserted, IsInsertedNo, IsInsertedYes, JoinCycle, UpdateFace,
+        BuildFace, Insert, IsInserted, IsInsertedNo, IsInsertedYes, JoinCycle,
+        Polygon, UpdateFace,
     },
     services::Services,
 };
 
-use super::{BuildFace, Polygon};
-
 /// Build a [`Shell`]
 pub trait BuildShell {
     /// Build a tetrahedron from the provided points