diff --git a/packages/nx/src/generators/utils/project-configuration.ts b/packages/nx/src/generators/utils/project-configuration.ts
index 21bfaeab4d435..c8ab3c12e597e 100644
--- a/packages/nx/src/generators/utils/project-configuration.ts
+++ b/packages/nx/src/generators/utils/project-configuration.ts
@@ -465,6 +465,7 @@ function findDeletedProjects(tree: Tree) {
 }
 
 let staticFSWorkspace: RawProjectsConfigurations;
+let cachedTree: Tree;
 function readRawWorkspaceJson(tree: Tree): RawProjectsConfigurations {
   const path = getWorkspacePath(tree);
   if (path && tree.exists(path)) {
@@ -477,13 +478,14 @@ function readRawWorkspaceJson(tree: Tree): RawProjectsConfigurations {
       findCreatedProjects(tree),
       (file) => readJson(tree, file)
     ).projects;
-    // We already have built a cache
-    if (!staticFSWorkspace) {
+    // We already have built a cache but need to confirm it's the same tree
+    if (!staticFSWorkspace || tree !== cachedTree) {
       staticFSWorkspace = buildWorkspaceConfigurationFromGlobs(
         nxJson,
         [...globForProjectFiles(tree.root, nxJson)],
         (file) => readJson(tree, file)
       );
+      cachedTree = tree;
     }
     const projects = { ...staticFSWorkspace.projects, ...createdProjects };
     findDeletedProjects(tree).forEach((file) => {
@@ -498,10 +500,11 @@ function readRawWorkspaceJson(tree: Tree): RawProjectsConfigurations {
         delete projects[matchingStaticProject[0]];
       }
     });
-    return {
+    staticFSWorkspace = {
       ...staticFSWorkspace,
       projects,
     };
+    return staticFSWorkspace;
   }
 }