diff --git a/packages/plugin-commands-installation/src/install.ts b/packages/plugin-commands-installation/src/install.ts
index fa4d1e0dfb..3355f93d24 100644
--- a/packages/plugin-commands-installation/src/install.ts
+++ b/packages/plugin-commands-installation/src/install.ts
@@ -330,12 +330,13 @@ export async function handler (
   input = input.filter(Boolean)
 
   const dir = opts.dir || process.cwd()
+  let allProjects = opts.allProjects
+  let workspacePackages = undefined
 
-  const workspacePackages = opts.workspaceDir
-    ? arrayOfWorkspacePackagesToMap(
-      await findWorkspacePackages(opts.workspaceDir, opts),
-    )
-    : undefined
+  if (opts.workspaceDir) {
+    allProjects = allProjects ?? await findWorkspacePackages(opts.workspaceDir, opts)
+    workspacePackages = arrayOfWorkspacePackagesToMap(allProjects)
+  }
 
   const store = await createOrConnectStoreController(opts)
   const installOpts = {
@@ -404,9 +405,7 @@ export async function handler (
   }
 
   if (opts.linkWorkspacePackages && opts.workspaceDir) {
-    // TODO: reuse somehow the previous read of packages
-    // this is not optimal
-    const allProjects = await findWorkspacePackages(opts.workspaceDir, opts)
+    allProjects = allProjects ?? await findWorkspacePackages(opts.workspaceDir, opts)
     const selectedProjectsGraph = await filterPkgsBySelectorObjects(allProjects, [
       {
         excludeSelf: true,