diff --git a/scripts/macpython-build-common.sh b/scripts/macpython-build-common.sh
index a6d6d31..982a0c0 100644
--- a/scripts/macpython-build-common.sh
+++ b/scripts/macpython-build-common.sh
@@ -69,6 +69,10 @@ for PYBIN in "${PYBINARIES[@]}"; do
     VENVS+=(${VENV})
 done
 
+# -----------------------------------------------------------------------
+SKBUILD_DIR=_skbuild
+
+
 # -----------------------------------------------------------------------
 # Ensure that requirements are met
 brew update
diff --git a/scripts/macpython-build-module-wheels.sh b/scripts/macpython-build-module-wheels.sh
index 8b6d491..b857a53 100755
--- a/scripts/macpython-build-module-wheels.sh
+++ b/scripts/macpython-build-module-wheels.sh
@@ -45,8 +45,17 @@ fi
 # -----------------------------------------------------------------------
 # These variables are set in common script:
 #
+# * CMAKE_EXECUTABLE
+# * CMAKE_OPTIONS
+# * MACPYTHON_PY_PREFIX
+# * PYBINARIES
+# * PYTHON_VERSIONS
+# * NINJA_EXECUTABLE
+# * SCRIPT_DIR
+# * SKBUILD_DIR
+# * VENVS=()
+
 MACPYTHON_PY_PREFIX=""
-# PYBINARIES="" # unused
 SCRIPT_DIR=""
 VENVS=()
 
@@ -105,7 +114,7 @@ for VENV in "${VENVS[@]}"; do
       -DPython3_INCLUDE_DIR:PATH=${Python3_INCLUDE_DIR} \
       ${CMAKE_OPTIONS} \
     || exit 1
-    # ${Python3_EXECUTABLE} setup.py clean    # Permission denied
+    # rm -r ${SKBUILD_DIR} # Permission denied
 done
 
 for wheel in $PWD/dist/*.whl; do
diff --git a/scripts/macpython-build-wheels.sh b/scripts/macpython-build-wheels.sh
index fb25cec..d1dfd43 100755
--- a/scripts/macpython-build-wheels.sh
+++ b/scripts/macpython-build-wheels.sh
@@ -19,6 +19,16 @@
 # -----------------------------------------------------------------------
 # These variables are set in common script:
 #
+# * CMAKE_EXECUTABLE
+# * CMAKE_OPTIONS
+# * MACPYTHON_PY_PREFIX
+# * PYBINARIES
+# * PYTHON_VERSIONS
+# * NINJA_EXECUTABLE
+# * SCRIPT_DIR
+# * SKBUILD_DIR
+# * VENVS=()
+
 MACPYTHON_PY_PREFIX=""
 PYBINARIES=""
 SCRIPT_DIR=""
@@ -136,7 +146,7 @@ for VENV in "${VENVS[@]}"; do
         -DITK_WRAP_DOC:BOOL=ON \
         ${CMAKE_OPTIONS}
       # Cleanup
-      ${Python3_EXECUTABLE} setup.py clean
+      rm -r ${SKBUILD_DIR}
 
     else
 
@@ -199,7 +209,7 @@ for VENV in "${VENVS[@]}"; do
           ${CMAKE_OPTIONS} \
         || exit 1
         # Cleanup
-        ${Python3_EXECUTABLE} setup.py clean
+        rm -r ${SKBUILD_DIR}
       done
 
     fi