diff -Naur dsss-0.67.orig/rebuild/mars.c dsss-0.67/rebuild/mars.c
--- dsss-0.67.orig/rebuild/mars.c	2007-06-29 09:44:44.000000000 +0200
+++ dsss-0.67/rebuild/mars.c	2007-07-22 23:35:20.176338928 +0200
@@ -441,23 +441,25 @@
             if (nloc != std::string::npos) cmachine = cmachine.substr(0, nloc);
             
             // 3) get the prefix
-            char *gdcdir, *gdcfil;
-            if (!whereAmI(compiler.c_str(), &gdcdir, &gdcfil)) {
+            if (readCommand(compiler + " -print-search-dirs", readBuf, READBUFSIZ) < 1) {
+                error("Failed to detect GDC search dirs");
                 error("%s is not in $PATH", compiler.c_str());
                 exit(1);
             }
+            std::string gdcdir = readBuf;
+            nloc = gdcdir.find('\n', 0);
+            if (nloc != std::string::npos) gdcdir = gdcdir.substr(0, nloc);
+            nloc = gdcdir.find(": /", 0);
+            if (nloc != std::string::npos) gdcdir = gdcdir.substr(nloc + 2);
             
             // 4) make include paths
+	    /* This: "/../../../../include/d/" + cversion + "/" always works on any GCC installation! */
             if (!global.params.imppath)
                 global.params.imppath = new Array();
             global.params.imppath->push(strdup(
-                (std::string(gdcdir) + "/../include/d/" + cversion + "/").c_str()));
+                (gdcdir + "../../../../include/d/" + cversion + "/").c_str()));
             global.params.imppath->push(strdup(
-                (std::string(gdcdir) + "/../include/d/" + cversion + "/" + cmachine + "/").c_str()));
-            global.params.imppath->push(strdup(
-                (std::string(gdcdir) + "/../" + cmachine + "/include/d/" + cversion + "/").c_str()));
-            global.params.imppath->push(strdup(
-                (std::string(gdcdir) + "/../" + cmachine + "/include/d/" + cversion + "/" + cmachine + "/").c_str()));
+                (gdcdir + "../../../../include/d/" + cversion + "/" + cmachine + "/").c_str()));
         }
     }