diff --git a/internal/devpkg/package.go b/internal/devpkg/package.go
index c0b2d9ce539..956a1372038 100644
--- a/internal/devpkg/package.go
+++ b/internal/devpkg/package.go
@@ -416,13 +416,7 @@ func (p *Package) Versioned() string {
 }
 
 func (p *Package) IsLegacy() bool {
-	if !p.IsDevboxPackage() || p.isVersioned() {
-		return false
-	}
-	if p.IsInstallable() {
-		return false
-	}
-	return p.lockfile.Get(p.Raw).GetSource() == ""
+	return p.IsDevboxPackage() && !p.isVersioned() && p.lockfile.Get(p.Raw).GetSource() == ""
 }
 
 func (p *Package) LegacyToVersioned() string {
@@ -554,3 +548,12 @@ func (p *Package) StoreName() (string, error) {
 	}
 	return name, nil
 }
+
+func (p *Package) EnsureUninstallableIsInLockfile() error {
+	// TODO savil: Do we need the IsDevboxPackage check here?
+	if !p.IsInstallable() || !p.IsDevboxPackage() {
+		return nil
+	}
+	_, err := p.lockfile.Resolve(p.Raw)
+	return err
+}
diff --git a/internal/impl/packages.go b/internal/impl/packages.go
index b6ab41f7537..3c477ce8b45 100644
--- a/internal/impl/packages.go
+++ b/internal/impl/packages.go
@@ -235,6 +235,17 @@ func (d *Devbox) ensurePackagesAreInstalled(ctx context.Context, mode installMod
 		return err
 	}
 
+	// Update lockfile with new packages that are not to be installed
+	cfgPkgs, err := d.ConfigPackages()
+	if err != nil {
+		return err
+	}
+	for _, pkg := range cfgPkgs {
+		if err := pkg.EnsureUninstallableIsInLockfile(); err != nil {
+			return err
+		}
+	}
+
 	return d.lockfile.Save()
 }