diff --git a/.changeset/angry-heads-design.md b/.changeset/angry-heads-design.md
new file mode 100644
index 0000000000..0b4a866fb1
--- /dev/null
+++ b/.changeset/angry-heads-design.md
@@ -0,0 +1,5 @@
+---
+'@backstage/cli': patch
+---
+
+Disallow import fallback of critical shared dependencies in module federation.
diff --git a/packages/cli/src/modules/build/lib/bundler/config.ts b/packages/cli/src/modules/build/lib/bundler/config.ts
index c4011ede48..bf78d04b4a 100644
--- a/packages/cli/src/modules/build/lib/bundler/config.ts
+++ b/packages/cli/src/modules/build/lib/bundler/config.ts
@@ -264,24 +264,30 @@ export async function createConfig(
             singleton: true,
             requiredVersion: '*',
             eager: !isRemote,
+            import: false,
           },
           'react-dom': {
             singleton: true,
             requiredVersion: '*',
             eager: !isRemote,
+            import: false,
           },
           // React Router
           'react-router': {
             singleton: true,
             requiredVersion: '*',
             eager: !isRemote,
+            import: false,
           },
           'react-router-dom': {
             singleton: true,
             requiredVersion: '*',
             eager: !isRemote,
+            import: false,
           },
           // MUI v4
+          // not setting import: false for MUI packages as this
+          // will break once Backstage moves to BUI
           '@material-ui/core/styles': {
             singleton: true,
             requiredVersion: '*',
@@ -293,6 +299,8 @@ export async function createConfig(
             eager: !isRemote,
           },
           // MUI v5
+          // not setting import: false for MUI packages as this
+          // will break once Backstage moves to BUI
           '@mui/material/styles/': {
             singleton: true,
             requiredVersion: '*',