diff --git a/ninja b/ninja
index da4502b33..45f14e62f 100755
--- a/ninja
+++ b/ninja
@@ -5,4 +5,4 @@
 # found in the LICENSE file.
 
 base_dir=$(dirname "$0")
-PYTHONDONTWRITEBYTECODE=1 exec "$base_dir/python-bin/python3" "$base_dir/ninja.py" "$@"
+PYTHONDONTWRITEBYTECODE=1 exec python3 "$base_dir/ninja.py" "$@"
diff --git a/ninja.bat b/ninja.bat
index 8394bd7b2..421e0a968 100644
--- a/ninja.bat
+++ b/ninja.bat
@@ -4,11 +4,9 @@
 :: found in the LICENSE file.
 setlocal
 
-set scriptdir=%~dp0
-
 :: Ensure that "depot_tools" is somewhere in PATH so this tool can be used
 :: standalone, but allow other PATH manipulations to take priority.
-set PATH=%PATH%;%scriptdir%
+set PATH=%PATH%;%~dp0
 
 :: Defer control.
-call %scriptdir%python-bin\python3.bat "%~dp0\ninja.py" %*
+python3 "%~dp0\ninja.py" %*