=== modified file 'src/main.cpp'
--- src/main.cpp	2015-11-20 17:34:03 +0000
+++ src/main.cpp	2016-04-06 08:15:43 +0000
@@ -540,6 +540,12 @@
 {
     gchar const *path = g_getenv("PATH");
     gchar const *pythonpath = g_getenv("PYTHONPATH");
+    gchar const *inkscape_extensions_path = g_getenv("INKSCAPE_EXTENSIONS_PATH");
+    gchar const *inkscape_extensions_pythonpath = g_getenv("INKSCAPE_EXTENSIONS_PYTHONPATH");
+    g_message("PATH: %s", path);
+    g_message("PYTHONPATH: %s", pythonpath);
+    g_message("INKSCAPE_EXTENSIONS_PATH: %s", inkscape_extensions_path);
+    g_message("INKSCAPE_EXTENSIONS_PYTHONPATH: %s", inkscape_extensions_pythonpath);
 
     gchar *python = g_build_filename(exe, "python", NULL);
     gchar *scripts = g_build_filename(exe, "python", "Scripts", NULL);
@@ -557,33 +563,41 @@
 
     gchar *new_path;
     gchar *new_pythonpath;
-    if (path) {
-        new_path = g_strdup_printf("%s;%s;%s;%s;%s", exe, python, scripts, perl, path);
+    if (inkscape_extensions_path) {
+        new_path = const_cast<gchar *>(inkscape_extensions_path);
     } else {
-        new_path = g_strdup_printf("%s;%s;%s;%s", exe, python, scripts, perl);
+        if (path) {
+            new_path = g_strdup_printf("%s;%s;%s;%s;%s", exe, python, scripts, perl, path);
+        } else {
+            new_path = g_strdup_printf("%s;%s;%s;%s", exe, python, scripts, perl);
+        }
     }
-    if (pythonpath) {
-        new_pythonpath = g_strdup_printf("%s;%s;%s;%s",
-             python_s, pythonlib_s, pythondll_s, pythonpath);
+    if (inkscape_extensions_pythonpath) {
+        new_pythonpath = const_cast<gchar *>(inkscape_extensions_pythonpath);
     } else {
-        new_pythonpath = g_strdup_printf("%s;%s;%s",
-            python_s, pythonlib_s, pythondll_s);
+        if (pythonpath) {
+            new_pythonpath = g_strdup_printf("%s;%s;%s;%s",
+                 python_s, pythonlib_s, pythondll_s, pythonpath);
+        } else {
+            new_pythonpath = g_strdup_printf("%s;%s;%s",
+                python_s, pythonlib_s, pythondll_s);
+        }
     }
 
     g_setenv("PATH", new_path, TRUE);
     g_setenv("PYTHONPATH", new_pythonpath, TRUE);
 
-    /*
-    printf("PATH = %s\n\n", g_getenv("PATH"));
-    printf("PYTHONPATH = %s\n\n", g_getenv("PYTHONPATH"));
+
+    g_message("New PATH = %s\n\n", g_getenv("PATH"));
+    g_message("New PYTHONPATH = %s\n\n", g_getenv("PYTHONPATH"));
 
     gchar *p = g_find_program_in_path("python");
     if (p) {
-        printf("python in %s\n\n", p);
+        g_message("python in %s\n\n", p);
         g_free(p);
     } else {
-        printf("python not found\n\n");
-    }*/
+        g_message("python not found\n\n");
+    }
 
     // INKSCAPE_LOCALEDIR is needed by Python/Gettext
     gchar *localepath = g_build_filename(exe, PACKAGE_LOCALE_DIR, NULL);