diff --git a/README.adoc b/README.adoc
index 0c76e72..2c97aae 100644
--- a/README.adoc
+++ b/README.adoc
@@ -10674,17 +10674,17 @@ git clone https://my.private.repo.com/my-fork/gem5.git gem5-internal
 gem5_internal="$(pwd)/gem5-internal"
 ....
 
-Next, when you want to build with this repository, use the `--gem5-worktree-path` argument to point this repository to the private source code:
+Next, when you want to build with this repository, use the `--gem5-source` argument to point this repository to the private source code:
 
 ....
 cd linux-kernel-module-cheat
 ./build-gem5 \
   --gem5-build-id private/master \
-  --gem5-worktree-path "$gem5_internal" \
+  --gem5-source "$gem5_internal" \
 ;
-./run-gem5
+./run-gem5 \
   --gem5-build-id private/master \
-  --gem5-worktree-path "$gem5_internal" \
+  --gem5-source "$gem5_internal" \
 ;
 ....
 
diff --git a/build-gem5 b/build-gem5
index d947ae3..4b2316b 100755
--- a/build-gem5
+++ b/build-gem5
@@ -27,7 +27,7 @@ else:
     start_time = time.time()
     os.makedirs(binaries_dir, exist_ok=True)
     os.makedirs(disks_dir, exist_ok=True)
-    if args.gem5_src is None:
+    if args.gem5_source is None:
         if not os.path.exists(os.path.join(common.gem5_src_dir, '.git')):
             if common.gem5_src_dir == common.gem5_default_src_dir:
                 raise Exception('gem5 submodule not checked out')
diff --git a/common.py b/common.py
index 9ed6576..56ab7ff 100644
--- a/common.py
+++ b/common.py
@@ -134,7 +134,7 @@ given, just use the submodule source.
 '''
     )
     parser.add_argument(
-        '--gem5-src',
+        '--gem5-source',
         help='''\
 Use the given directory as the gem5 source tree. Ignore `--gem5-worktree`.
 '''
@@ -531,9 +531,9 @@ def setup(parser):
     this.crosstool_ng_build_dir = os.path.join(this.crosstool_ng_buildid_dir, 'build')
     this.crosstool_ng_download_dir = os.path.join(this.crosstool_ng_out_dir, 'download')
     this.gem5_default_src_dir = os.path.join(submodules_dir, 'gem5')
-    if args.gem5_src is not None:
-        this.gem5_src_dir = args.gem5_src
-        assert(os.path.exists(args.gem5_src))
+    if args.gem5_source is not None:
+        this.gem5_src_dir = args.gem5_source
+        assert(os.path.exists(args.gem5_source))
     else:
         if args.gem5_worktree is not None:
             this.gem5_src_dir = os.path.join(this.gem5_non_default_src_root_dir, args.gem5_worktree)