diff --git a/packages/common/src/lib/workspace/project-graph.ts b/packages/common/src/lib/workspace/project-graph.ts
index ba4c493d..37dc61be 100644
--- a/packages/common/src/lib/workspace/project-graph.ts
+++ b/packages/common/src/lib/workspace/project-graph.ts
@@ -73,6 +73,9 @@ function getDependenciesForProject(
   const sourceProjectRoot = getProjectRootFromFile(filePath);
   const sourcePkgInfo = workspace.projects[sourceProjectRoot];
 
+  if(!sourcePkgInfo)
+    return dependencies;
+
   sourcePkgInfo.dependencies?.forEach((depPkgInfo) => {
     const targetProjectName = workspace.packages[depPkgInfo.packageId];