Index: compiler/options.nim
--- compiler/options.nim.orig
+++ compiler/options.nim
@@ -576,7 +576,7 @@ proc newConfigRef*(): ConfigRef =
     outFile: RelativeFile"",
     outDir: AbsoluteDir"",
     prefixDir: AbsoluteDir"",
-    libpath: AbsoluteDir"", nimcacheDir: AbsoluteDir"",
+    libpath: AbsoluteDir"${PREFIX}/lib/nim", nimcacheDir: AbsoluteDir"",
     dllOverrides: newStringTable(modeCaseInsensitive),
     moduleOverrides: newStringTable(modeStyleInsensitive),
     cfileSpecificOptions: newStringTable(modeCaseSensitive),
