diff --git a/src/GLX/libglxmapping.c b/src/GLX/libglxmapping.c
index ff2c3a6..3ac21e9 100644
--- a/src/GLX/libglxmapping.c
+++ b/src/GLX/libglxmapping.c
@@ -28,6 +28,7 @@
 #include <pthread.h>
 #include <dlfcn.h>
 #include <string.h>
+#include <sys/stat.h>
 
 #if defined(HASH_DEBUG)
 # include <stdio.h>
@@ -292,7 +293,33 @@ static char *ConstructVendorLibraryFilename(const char *vendorName)
     char *filename;
     int ret;
 
+    const char* env = NULL;
+    char **tokens;
+    int i;
+    struct stat st;
+
+    env = getenv("GUIX_GL_PATH");
+
+    if (env != NULL)  {
+
+        tokens = SplitString(env, NULL, ":");
+
+        if (tokens != NULL) {
+            for (i=0; tokens[i] != NULL; i++) {
+                ret = glvnd_asprintf(&filename, "%s/libGLX_%s.so.0", tokens[i], vendorName);
+                if (ret >= 0) {
+                    if (stat(filename, &st) == 0) {
+                        free(tokens);
+
+                        return filename;
+                    }
+                }
+            }
+        }
+        free(tokens);
+    }
+
     ret = glvnd_asprintf(&filename, "libGLX_%s.so.0", vendorName);
 
     if (ret < 0) {
         return NULL;