diff --git a/backend/src/install/update.rs b/backend/src/install/update.rs
index 9b4b7b42f..9acac4830 100644
--- a/backend/src/install/update.rs
+++ b/backend/src/install/update.rs
@@ -1,20 +1,66 @@
 use std::collections::BTreeMap;
 
-use patch_db::{DbHandle, LockType};
+use patch_db::{DbHandle, LockReceipt, LockTargetId, LockType, Verifier};
 use rpc_toolkit::command;
+use tracing::instrument;
 
+use crate::config::not_found;
 use crate::context::RpcContext;
-use crate::dependencies::{break_transitive, BreakageRes, DependencyError};
+use crate::db::model::CurrentDependents;
+use crate::dependencies::{
+    break_transitive, BreakTransitiveReceipts, BreakageRes, DependencyError,
+};
 use crate::s9pk::manifest::PackageId;
 use crate::util::serde::display_serializable;
 use crate::util::Version;
 use crate::Error;
 
+pub struct UpdateReceipts {
+    break_receipts: BreakTransitiveReceipts,
+    current_dependents: LockReceipt<CurrentDependents, String>,
+    dependency: LockReceipt<crate::dependencies::DepInfo, (String, String)>,
+}
+
+impl UpdateReceipts {
+    pub async fn new<'a>(db: &'a mut impl DbHandle) -> Result<Self, Error> {
+        let mut locks = Vec::new();
+
+        let setup = Self::setup(&mut locks);
+        Ok(setup(&db.lock_all(locks).await?)?)
+    }
+
+    pub fn setup(locks: &mut Vec<LockTargetId>) -> impl FnOnce(&Verifier) -> Result<Self, Error> {
+        let break_receipts = BreakTransitiveReceipts::setup(locks);
+        let current_dependents = crate::db::DatabaseModel::new()
+            .package_data()
+            .star()
+            .installed()
+            .map(|x| x.current_dependents())
+            .make_locker(LockType::Write)
+            .add_to_keys(locks);
+        let dependency = crate::db::DatabaseModel::new()
+            .package_data()
+            .star()
+            .installed()
+            .map(|x| x.manifest().dependencies().star())
+            .make_locker(LockType::Write)
+            .add_to_keys(locks);
+        move |skeleton_key| {
+            Ok(Self {
+                break_receipts: break_receipts(skeleton_key)?,
+                current_dependents: current_dependents.verify(skeleton_key)?,
+                dependency: dependency.verify(skeleton_key)?,
+            })
+        }
+    }
+}
+
 #[command(subcommands(dry))]
 pub async fn update() -> Result<(), Error> {
     Ok(())
 }
 
+#[instrument(skip(ctx))]
 #[command(display(display_serializable))]
 pub async fn dry(
     #[context] ctx: RpcContext,
@@ -24,52 +70,34 @@ pub async fn dry(
     let mut db = ctx.db.handle();
     let mut tx = db.begin().await?;
     let mut breakages = BTreeMap::new();
-    let receipts = crate::dependencies::BreakTransitiveReceipts::new(&mut tx).await?;
-    crate::db::DatabaseModel::new()
-        .package_data()
-        .lock(&mut tx, LockType::Read)
-        .await?;
+    let receipts = UpdateReceipts::new(&mut tx).await?;
 
-    for dependent in crate::db::DatabaseModel::new()
-        .package_data()
-        .idx_model(&id)
-        .and_then(|m| m.installed())
-        .expect(&mut tx)
-        .await?
-        .current_dependents()
-        .keys(&mut tx, true)
+    for dependent in receipts
+        .current_dependents
+        .get(&mut tx, &id)
         .await?
+        .ok_or_else(not_found)?
+        .0
+        .keys()
         .into_iter()
-        .filter(|dependent| &id != dependent)
+        .filter(|dependent| &&id != dependent)
     {
-        let version_req = crate::db::DatabaseModel::new()
-            .package_data()
-            .idx_model(&dependent)
-            .and_then(|m| m.installed())
-            .expect(&mut tx)
-            .await?
-            .manifest()
-            .dependencies()
-            .idx_model(&id)
-            .expect(&mut tx)
-            .await?
-            .get(&mut tx, true)
-            .await?
-            .into_owned()
-            .version;
-        if !version.satisfies(&version_req) {
-            break_transitive(
-                &mut tx,
-                &dependent,
-                &id,
-                DependencyError::IncorrectVersion {
-                    expected: version_req,
-                    received: version.clone(),
-                },
-                &mut breakages,
-                &receipts,
-            )
-            .await?;
+        if let Some(dep_info) = receipts.dependency.get(&mut tx, (&dependent, &id)).await? {
+            let version_req = dep_info.version;
+            if !version.satisfies(&version_req) {
+                break_transitive(
+                    &mut tx,
+                    &dependent,
+                    &id,
+                    DependencyError::IncorrectVersion {
+                        expected: version_req,
+                        received: version.clone(),
+                    },
+                    &mut breakages,
+                    &receipts.break_receipts,
+                )
+                .await?;
+            }
         }
     }
     tx.abort().await?;