diff --git a/cli/npm/resolution/mod.rs b/cli/npm/resolution/mod.rs
index 18158bd172..c4d05598c8 100644
--- a/cli/npm/resolution/mod.rs
+++ b/cli/npm/resolution/mod.rs
@@ -382,10 +382,6 @@ impl NpmResolution {
       .cloned()
   }
 
-  pub fn all_packages(&self) -> Vec<NpmResolutionPackage> {
-    self.snapshot.read().all_packages()
-  }
-
   pub fn all_packages_partitioned(&self) -> NpmPackagesPartitioned {
     self.snapshot.read().all_packages_partitioned()
   }
@@ -398,15 +394,12 @@ impl NpmResolution {
     self.snapshot.read().clone()
   }
 
-  pub fn lock(
-    &self,
-    lockfile: &mut Lockfile,
-    snapshot: &NpmResolutionSnapshot,
-  ) -> Result<(), AnyError> {
+  pub fn lock(&self, lockfile: &mut Lockfile) -> Result<(), AnyError> {
+    let snapshot = self.snapshot.read();
     for (package_req, package_id) in snapshot.package_reqs.iter() {
       lockfile.insert_npm_specifier(package_req, package_id);
     }
-    for package in self.all_packages() {
+    for package in snapshot.all_packages() {
       lockfile.check_or_insert_npm_package(&package)?;
     }
     Ok(())
diff --git a/cli/npm/resolvers/global.rs b/cli/npm/resolvers/global.rs
index d73ccbe9b6..41a1329ec2 100644
--- a/cli/npm/resolvers/global.rs
+++ b/cli/npm/resolvers/global.rs
@@ -169,8 +169,7 @@ impl InnerNpmPackageResolver for GlobalNpmPackageResolver {
   }
 
   fn lock(&self, lockfile: &mut Lockfile) -> Result<(), AnyError> {
-    let snapshot = self.resolution.snapshot();
-    self.resolution.lock(lockfile, &snapshot)
+    self.resolution.lock(lockfile)
   }
 }
 
diff --git a/cli/npm/resolvers/local.rs b/cli/npm/resolvers/local.rs
index b702d3bb35..7c1f38b471 100644
--- a/cli/npm/resolvers/local.rs
+++ b/cli/npm/resolvers/local.rs
@@ -263,7 +263,7 @@ impl InnerNpmPackageResolver for LocalNpmPackageResolver {
   }
 
   fn lock(&self, lockfile: &mut Lockfile) -> Result<(), AnyError> {
-    self.resolution.lock(lockfile, &self.snapshot())
+    self.resolution.lock(lockfile)
   }
 }