diff --git a/pkgs/tools/backup/duply/default.nix b/pkgs/tools/backup/duply/default.nix
index 5bde5e78afad..a055b87c2631 100644
--- a/pkgs/tools/backup/duply/default.nix
+++ b/pkgs/tools/backup/duply/default.nix
@@ -2,9 +2,7 @@
 , gnugrep, txt2man, makeWrapper, which
 }:
 
-let
-  pythonEnv = python.withPackages (ps: [ps.cryptography] );
-in stdenv.mkDerivation {
+stdenv.mkDerivation {
   name = "duply-1.9.2";
 
   src = fetchurl {
@@ -13,7 +11,7 @@ in stdenv.mkDerivation {
   };
 
   buildInputs = [ txt2man makeWrapper ];
-  propagatedBuildInputs = [ pythonEnv ];
+
   phases = [ "unpackPhase" "installPhase" ];
 
   installPhase = ''
@@ -22,7 +20,7 @@ in stdenv.mkDerivation {
     sed -i 's|/usr/bin/env bash|${bash}/bin/bash|' duply
     mv duply "$out/bin"
     wrapProgram "$out/bin/duply" --set PATH \
-        "${coreutils}/bin:${pythonEnv}/bin:${duplicity}/bin:${gawk}/bin:${gnupg1}/bin:${bash}/bin:${gnugrep}/bin:${txt2man}/bin:${which}/bin"
+        "${coreutils}/bin:${python}/bin:${duplicity}/bin:${gawk}/bin:${gnupg1}/bin:${bash}/bin:${gnugrep}/bin:${txt2man}/bin:${which}/bin"
     "$out/bin/duply" txt2man | gzip -c > "$out/share/man/man1/duply.1.gz"
   '';