diff --git a/easybuild/easyblocks/generic/bundle.py b/easybuild/easyblocks/generic/bundle.py
index ce499ebc066..ea4c0fef462 100644
--- a/easybuild/easyblocks/generic/bundle.py
+++ b/easybuild/easyblocks/generic/bundle.py
@@ -244,10 +244,6 @@ def __init__(self, *args, **kwargs):
                 # instantiate the component to transfer further information
                 comp_instance = comp_cfg.easyblock(comp_cfg, logfile=self.logfile)
 
-                # correct build/install dirs
-                comp_instance.builddir = self.builddir
-                comp_instance.install_subdir, comp_instance.installdir = self.install_subdir, self.installdir
-
                 # check if sanity checks are enabled for the component
                 if self.cfg['sanity_check_all_components'] or comp_cfg['name'] in self.cfg['sanity_check_components']:
                     self.comp_cfgs_sanity_check.append(comp_instance)
@@ -261,6 +257,13 @@ def __init__(self, *args, **kwargs):
             self.cfg['sanity_check_paths'] = self.backup_sanity_paths
             self.cfg['sanity_check_commands'] = self.backup_sanity_cmds
 
+    def post_init(self):
+        super().post_init()
+        for _, comp in self.comp_instances:
+            # correct build/install dirs after possibly changing them in parent post_init
+            comp.builddir = self.builddir
+            comp.install_subdir, comp.installdir = self.install_subdir, self.installdir
+
     def check_checksums(self):
         """
         Check whether a SHA256 checksum is available for all sources & patches (incl. extensions).
@@ -485,21 +488,22 @@ def sanity_check_step(self, *args, **kwargs):
         """
         if self.cfg['exts_list'] or self.cfg['sanity_check_paths'] or self.cfg['sanity_check_commands']:
             super().sanity_check_step(*args, **kwargs)
+            test_module_load = False
         else:
             self.log.info("Testing loading of module '%s' by means of sanity check" % self.full_mod_name)
-            fake_mod_data = self.load_fake_module(purge=True)
-            self.log.debug("Cleaning up after testing loading of module")
-            self.clean_up_fake_module(fake_mod_data)
+            test_module_load = True
 
-        # run sanity checks for specific components
         cnt = len(self.comp_cfgs_sanity_check)
+
+        if not self.sanity_check_module_loaded and (test_module_load or cnt > 0):  # Need it loaded for components too
+            self.sanity_check_load_module(extension=kwargs.get('extension', False),
+                                          extra_modules=kwargs.get('extra_modules'))
+            loaded_module = self.sanity_check_module_loaded
+        else:
+            loaded_module = False
+
+        # run sanity checks for specific components
         if cnt > 0:
-            if self.sanity_check_module_loaded:
-                loaded_module = False
-            else:
-                self.sanity_check_load_module(extension=kwargs.get('extension', False),
-                                              extra_modules=kwargs.get('extra_modules', None))
-                loaded_module = self.sanity_check_module_loaded
             for idx, comp in enumerate(self.comp_cfgs_sanity_check):
                 print_msg("sanity checking bundle component %s v%s (%i/%i)...", comp.name, comp.version, idx + 1, cnt)
                 self.log.info("Starting sanity check step for component %s v%s", comp.name, comp.version)
@@ -508,8 +512,9 @@ def sanity_check_step(self, *args, **kwargs):
                 comp.sanity_check_module_loaded = True
                 comp.run_step('sanity_check', [lambda x: x.sanity_check_step])
                 comp.sanity_check_module_loaded = False
-            if loaded_module:
-                if self.fake_mod_data:
-                    self.clean_up_fake_module(self.fake_mod_data)
-                    self.fake_mod_data = None
-                self.sanity_check_module_loaded = False
+
+        if loaded_module:
+            if self.fake_mod_data:
+                self.clean_up_fake_module(self.fake_mod_data)
+                self.fake_mod_data = None
+            self.sanity_check_module_loaded = False