diff --git a/pkgs/applications/networking/browsers/tor-browser-bundle/default.nix b/pkgs/applications/networking/browsers/tor-browser-bundle/default.nix
index 2c6940e037cd..834be5cd3020 100644
--- a/pkgs/applications/networking/browsers/tor-browser-bundle/default.nix
+++ b/pkgs/applications/networking/browsers/tor-browser-bundle/default.nix
@@ -34,7 +34,7 @@
 , rsync
 
 # Pluggable transports
-, obfsproxy
+, obfs4
 
 # Customization
 , extraPrefs ? ""
@@ -171,9 +171,9 @@ stdenv.mkDerivation rec {
     EOF
 
     # Configure pluggable transports
-    cat >>$TBDATA_PATH/torrc-defaults <<EOF
-    ClientTransportPlugin obfs2,obfs3 exec ${obfsproxy}/bin/obfsproxy managed
-    EOF
+    substituteInPlace $TBDATA_PATH/torrc-defaults \
+      --replace "./TorBrowser/Tor/PluggableTransports/obfs4proxy" \
+                "${obfs4}/bin/obfs4proxy"
 
     # Hard-code path to TBB fonts; xref: FONTCONFIG_FILE in the wrapper below
     sed $bundleData/$bundlePlatform/Data/fontconfig/fonts.conf \
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 49c2cd2eed15..15561dc6ae3f 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -6093,7 +6093,6 @@ in
   tor-browser-bundle = callPackage ../applications/networking/browsers/tor-browser-bundle {
     stdenv = stdenvNoCC;
     tor-browser-unwrapped = firefoxPackages.tor-browser;
-    inherit (python27Packages) obfsproxy;
   };
 
   touchegg = callPackage ../tools/inputmethods/touchegg { };