diff --git a/pkgs/applications/misc/nut/default.nix b/pkgs/applications/misc/nut/default.nix
index 3e972f672cc2..25c904880923 100644
--- a/pkgs/applications/misc/nut/default.nix
+++ b/pkgs/applications/misc/nut/default.nix
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
   
   postInstall = ''
     wrapProgram $out/bin/nut-scanner --prefix LD_LIBRARY_PATH : \
-      "$out/lib:${neon}/lib:${libusb}/lib:${avahi}/lib:${freeipmi}/lib"
+      "$out/lib:${neon}/lib:${libusb.out}/lib:${avahi}/lib:${freeipmi}/lib"
   '';
 
   meta = {
diff --git a/pkgs/development/libraries/scmccid/default.nix b/pkgs/development/libraries/scmccid/default.nix
index f9845d60b490..f88bd64f597b 100644
--- a/pkgs/development/libraries/scmccid/default.nix
+++ b/pkgs/development/libraries/scmccid/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ patchelf ];
 
   installPhase = ''
-    RPATH=${libusb}/lib:${stdenv.cc.libc.out}/lib
+    RPATH=${libusb.out}/lib:${stdenv.cc.libc.out}/lib
 
     for a in proprietary/*/Contents/Linux/*.so*; do
         if ! test -L $a; then