diff --git a/pkgs/applications/science/programming/fdr/default.nix b/pkgs/applications/science/programming/fdr/default.nix
index 8ed8e0e73b0..3bfb70f5ce8 100644
--- a/pkgs/applications/science/programming/fdr/default.nix
+++ b/pkgs/applications/science/programming/fdr/default.nix
@@ -1,9 +1,9 @@
 {stdenv, fetchurl, qtbase, qtx11extras, ncurses, xorg, zlib, python27Packages}:
 stdenv.mkDerivation {
-  name = "fdr-4.2.0";
+  name = "fdr-4.2.3";
   src = fetchurl {
-    url = https://www.cs.ox.ac.uk/projects/fdr/downloads/fdr-3754-linux-x86_64.tar.gz;
-    sha256 = "d24492485db9b8b95c62c53a6396094f836ee079cfc743688a397503c3ec9bf8";
+    url = https://www.cs.ox.ac.uk/projects/fdr/downloads/fdr-3789-linux-x86_64.tar.gz;
+    sha256 = "0n2yqichym5xdawlgk3r7yha88k7ycnx6585jfrcm7043sls1i88";
   };
 
   libPath = stdenv.lib.makeLibraryPath [
@@ -28,7 +28,7 @@ stdenv.mkDerivation {
     cp -r * "$out"
     # Hack around lack of libtinfo in NixOS
     ln -s ${ncurses.out}/lib/libncursesw.so.6 $out/lib/libtinfo.so.5
-    ln -s ${qtbase.out}/$qtPluginPrefix $out/lib/qt_plugins
+    ln -s ${qtbase.bin}/${qtbase.qtPluginPrefix} $out/lib/qt_plugins
     ln -s ${zlib.out}/lib/libz.so.1 $out/lib/libz.so.1
 
     for b in fdr4 _fdr4 refines _refines cspmprofiler cspmexplorerprof