diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index f098dab1c0bf..17db5d14c325 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -17093,9 +17093,9 @@ in modules // {
           -e 's|^FREETYPE_ROOT =.*$|FREETYPE_ROOT = ${libinclude pkgs.freetype}|g ;
               s|^JPEG_ROOT =.*$|JPEG_ROOT = ${libinclude pkgs.libjpeg}|g ;
               s|^ZLIB_ROOT =.*$|ZLIB_ROOT = ${libinclude pkgs.zlib}|g ;
-              s|^LCMS_ROOT =.*$|LCMS_ROOT = _lib_include("${pkgs.libwebp}")|g ;
+              s|^LCMS_ROOT =.*$|LCMS_ROOT = ${libinclude pkgs.libwebp}|g ;
               s|^TIFF_ROOT =.*$|TIFF_ROOT = ${libinclude pkgs.libtiff}|g ;
-              s|^TCL_ROOT=.*$|TCL_ROOT = _lib_include("${pkgs.tcl}")|g ;'
+              s|^TCL_ROOT=.*$|TCL_ROOT = ${libinclude pkgs.tcl}|g ;'
     ''
     # Remove impurities
     + stdenv.lib.optionalString stdenv.isDarwin ''