racket packages: fix typo after multiple build systems support (#40088)

lib/spack/spack/build_systems/racket.py

@@ -64,7 +64,7 @@ class RacketBuilder(spack.builder.Builder):
 
     @property
     def subdirectory(self):
-        if self.racket_name:
+        if self.pkg.racket_name:
             return "pkgs/{0}".format(self.pkg.racket_name)
         return None
 

var/spack/repos/builtin/packages/rkt-racket-lib/package.py

@@ -0,0 +1,20 @@
+# Copyright 2013-2023 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack.package import *
+
+
+class RktRacketLib(RacketPackage):
+    """Stub package for packages which are currently part of core
+    racket installation (but which may change in the future)."""
+
+    git = "ssh://git@github.com/racket/racket.git"
+
+    maintainers = ["elfprince13"]
+
+    version("8.3", commit="cab83438422bfea0e4bd74bc3e8305e6517cf25f")  # tag="v8.3"
+    depends_on("racket@8.3", type=("build", "run"), when="@8.3")
+
+    racket_name = "racket-lib"

var/spack/repos/builtin/packages/rkt-scheme-lib/package.py

@@ -17,3 +17,4 @@ class RktSchemeLib(RacketPackage):
     depends_on("rkt-base@8.3", type=("build", "run"), when="@8.3")
 
     racket_name = "scheme-lib"
+    subdirectory = None