Index: qtbase-opensource-src-5.9.0/src/network/kernel/qdnslookup_unix.cpp
===================================================================
--- qtbase-opensource-src-5.9.0.orig/src/network/kernel/qdnslookup_unix.cpp
+++ qtbase-opensource-src-5.9.0/src/network/kernel/qdnslookup_unix.cpp
@@ -92,7 +92,7 @@ static bool resolveLibraryInternal()
     if (!lib.load())
 #endif
     {
-        lib.setFileName(QLatin1String("resolv"));
+        lib.setFileName(QLatin1String(NIXPKGS_LIBRESOLV));
         if (!lib.load())
             return false;
     }
Index: qtbase-opensource-src-5.9.0/src/network/kernel/qhostinfo_unix.cpp
===================================================================
--- qtbase-opensource-src-5.9.0.orig/src/network/kernel/qhostinfo_unix.cpp
+++ qtbase-opensource-src-5.9.0/src/network/kernel/qhostinfo_unix.cpp
@@ -102,7 +102,7 @@ static bool resolveLibraryInternal()
     if (!lib.load())
 #endif
     {
-        lib.setFileName(QLatin1String("resolv"));
+        lib.setFileName(QLatin1String(NIXPKGS_LIBRESOLV));
         if (!lib.load())
             return false;
     }