diff --git a/builders/macos-python-builder.psm1 b/builders/macos-python-builder.psm1
index 72549a7..7b9f54c 100644
--- a/builders/macos-python-builder.psm1
+++ b/builders/macos-python-builder.psm1
@@ -80,8 +80,8 @@ class macOSPythonBuilder : NixPythonBuilder {
                 $env:CFLAGS = "-I/usr/local/opt/zlib/include"
             }
 
-            if ($this.Version -gt "3.7.12") {
-                $configureString += " --with-tcltk-includes='-I /usr/local/opt/tcl-tk/include' --with-tcltk-libs='-L/usr/local/opt/tcl-tk/lib -ltcl8.6 -ltk8.6'"
+            if ($this.Version -lt "3.10") {
+                $configureString += " --with-tcltk-includes='-I /usr/local/opt/tcl-tk/include/tcl-tk' --with-tcltk-libs='-L/usr/local/opt/tcl-tk/lib -ltcl8.6 -ltk8.6'"
 	        }
 
             if ($this.Version -eq "3.7.17") {