diff --git a/src/cargo/ops/cargo_package.rs b/src/cargo/ops/cargo_package.rs
index a8ae22db04a..99f1d4fdde7 100644
--- a/src/cargo/ops/cargo_package.rs
+++ b/src/cargo/ops/cargo_package.rs
@@ -448,15 +448,11 @@ fn error_custom_build_file_not_in_package(
 }
 
 /// Construct `Cargo.lock` for the package to be published.
-fn build_lock(ws: &Workspace<'_>, orig_pkg: &Package) -> CargoResult<String> {
+fn build_lock(ws: &Workspace<'_>, publish_pkg: &Package) -> CargoResult<String> {
     let gctx = ws.gctx();
     let orig_resolve = ops::load_pkg_lockfile(ws)?;
 
-    let manifest = prepare_for_publish(orig_pkg, ws)?;
-    let new_pkg = Package::new(manifest, orig_pkg.manifest_path());
-
-    // Regenerate Cargo.lock using the old one as a guide.
-    let tmp_ws = Workspace::ephemeral(new_pkg, ws.gctx(), None, true)?;
+    let tmp_ws = Workspace::ephemeral(publish_pkg.clone(), ws.gctx(), None, true)?;
     let mut tmp_reg = PackageRegistry::new(ws.gctx())?;
     let mut new_resolve = ops::resolve_with_previous(
         &mut tmp_reg,
@@ -687,6 +683,7 @@ fn tar(
 
     let base_name = format!("{}-{}", pkg.name(), pkg.version());
     let base_path = Path::new(&base_name);
+    let publish_pkg = prepare_for_publish(pkg, ws)?;
 
     let mut uncompressed_size = 0;
     for ar_file in ar_files {
@@ -717,11 +714,8 @@ fn tar(
             }
             FileContents::Generated(generated_kind) => {
                 let contents = match generated_kind {
-                    GeneratedFile::Manifest => {
-                        let manifest = prepare_for_publish(pkg, ws)?;
-                        manifest.to_resolved_contents()?
-                    }
-                    GeneratedFile::Lockfile => build_lock(ws, pkg)?,
+                    GeneratedFile::Manifest => publish_pkg.manifest().to_resolved_contents()?,
+                    GeneratedFile::Lockfile => build_lock(ws, &publish_pkg)?,
                     GeneratedFile::VcsInfo(ref s) => serde_json::to_string_pretty(s)?,
                 };
                 header.set_entry_type(EntryType::file());
diff --git a/src/cargo/util/toml/mod.rs b/src/cargo/util/toml/mod.rs
index 26084308e0c..523447d3263 100644
--- a/src/cargo/util/toml/mod.rs
+++ b/src/cargo/util/toml/mod.rs
@@ -218,7 +218,7 @@ fn warn_on_unused(unused: &BTreeSet<String>, warnings: &mut Vec<String>) {
     }
 }
 
-pub fn prepare_for_publish(me: &Package, ws: &Workspace<'_>) -> CargoResult<Manifest> {
+pub fn prepare_for_publish(me: &Package, ws: &Workspace<'_>) -> CargoResult<Package> {
     let contents = me.manifest().contents();
     let document = me.manifest().document();
     let toml_manifest = prepare_toml_for_publish(me.manifest().resolved_toml(), ws, me.root())?;
@@ -236,7 +236,8 @@ pub fn prepare_for_publish(me: &Package, ws: &Workspace<'_>) -> CargoResult<Mani
         &mut warnings,
         &mut errors,
     )?;
-    Ok(manifest)
+    let new_pkg = Package::new(manifest, me.manifest_path());
+    Ok(new_pkg)
 }
 
 /// Prepares the manifest for publishing.