diff --git a/docs/changes/2.2.0/npm-replace-registry-host.feature.md b/docs/changes/2.2.0/npm-replace-registry-host.feature.md
new file mode 100644
index 00000000..68e6d074
--- /dev/null
+++ b/docs/changes/2.2.0/npm-replace-registry-host.feature.md
@@ -0,0 +1,4 @@
+An npm repository's **Connect** panel in the web UI also shows
+`npm config set replace-registry-host <package-lock.json-host>`, which has npm
+download the tarballs of a `package-lock.json` written against another
+registry through the repository instead.
diff --git a/web/src/components/PackageConnect.test.ts b/web/src/components/PackageConnect.test.ts
index 8ed725c3..3b39e37e 100644
--- a/web/src/components/PackageConnect.test.ts
+++ b/web/src/components/PackageConnect.test.ts
@@ -27,6 +27,7 @@ describe('connectSnippets', () => {
     expect(snippets.map((s) => s.command)).toEqual([
       'npm config set registry https://f.example/repository/npm-all/',
       'npm config set @<scope>:registry https://f.example/repository/npm-all/',
+      'npm config set replace-registry-host <package-lock.json-host>',
       'npm login --registry https://f.example/repository/npm-all/',
     ])
     expect(
diff --git a/web/src/components/PackageConnect.tsx b/web/src/components/PackageConnect.tsx
index 14c7daf2..df307ff2 100644
--- a/web/src/components/PackageConnect.tsx
+++ b/web/src/components/PackageConnect.tsx
@@ -91,6 +91,13 @@ export function connectSnippets(
           command: `npm config set @<scope>:registry ${url}/`,
           copyLabel: 'Copy scope-registry command',
         },
+        {
+          // npm rewrites a lockfile's registry.npmjs.org URLs onto `registry`
+          // by itself; another registry's host it has to be told.
+          label: 'Install a package-lock.json written against another registry',
+          command: 'npm config set replace-registry-host <package-lock.json-host>',
+          copyLabel: 'Copy replace-registry-host command',
+        },
         {
           label: 'Sign in',
           command: `npm login --registry ${url}/`,