diff --git a/distros/ament-cmake-core-setup-hook/default.nix b/distros/ament-cmake-core-setup-hook/default.nix
index 1ae8bf0fd5..5f258ada83 100644
--- a/distros/ament-cmake-core-setup-hook/default.nix
+++ b/distros/ament-cmake-core-setup-hook/default.nix
@@ -2,5 +2,5 @@
 
 makeSetupHook {
   name = "ament-cmake-core-setup-hook";
-  substitutions.python_executable = python.pythonForBuild.interpreter;
+  substitutions.python_executable = python.pythonOnBuildForHost.interpreter;
 } ./setup-hook.sh
diff --git a/distros/ros2-overlay.nix b/distros/ros2-overlay.nix
index 838c43a6be..7c0bd208f2 100644
--- a/distros/ros2-overlay.nix
+++ b/distros/ros2-overlay.nix
@@ -77,7 +77,7 @@ rosSelf: rosSuper: with rosSelf.lib; {
   python-cmake-module = rosSuper.python-cmake-module.overrideAttrs ({ ... }: let
     python = rosSelf.python;
   in {
-    pythonExecutable = python.pythonForBuild.interpreter;
+    pythonExecutable = python.pythonOnBuildForHost.interpreter;
     pythonLibrary = "${python}/lib/lib${python.libPrefix}.so";
     pythonIncludeDir = "${python}/include/${python.libPrefix}";
     setupHook = ./python-cmake-module-setup-hook.sh;