--- pdb-extract-v3.0/src/extract.C	2007-09-11 17:19:48.000000000 +0200
+++ pdb-extract-v3.0/src/extract.C.new	2008-12-05 17:49:59.000000000 +0100
@@ -1689,7 +1689,7 @@
         open_file_error(inpfile, "get_mmcif");
     }
     
-    (!strcmp_case(CCP4,"yes"))? temp = getenv("CCP4"): temp = getenv("PDB_EXTRACT");
+    (!strcmp_case(CCP4,"yes"))? temp = getenv("CCP4"): temp = getenv("PDB_EXTRACT_ROOT");
     if(temp != NULL) {
         strcpy(pdb_extract, "");
         strcpy(pdb_extract_sf, "");