diff --git a/pkgs/applications/editors/emacs-modes/bbdb/default.nix b/pkgs/applications/editors/emacs-modes/bbdb/default.nix
index ec7a3e8e6002..da92c38d0780 100644
--- a/pkgs/applications/editors/emacs-modes/bbdb/default.nix
+++ b/pkgs/applications/editors/emacs-modes/bbdb/default.nix
@@ -4,6 +4,7 @@ stdenv.mkDerivation {
   name = "bbdb-2.35";
 
   src = fetchurl {
+    # not using mirror:// because it produces a different file
     url = http://bbdb.sourceforge.net/bbdb-2.35.tar.gz;
     sha256 = "3fb1316e2ed74d47ca61187fada550e58797467bd9e8ad67343ed16da769f916";
   };
diff --git a/pkgs/os-specific/linux/lxc/default.nix b/pkgs/os-specific/linux/lxc/default.nix
index c2a9deaa11f2..c1dec8b926a3 100644
--- a/pkgs/os-specific/linux/lxc/default.nix
+++ b/pkgs/os-specific/linux/lxc/default.nix
@@ -4,7 +4,7 @@ stdenv.mkDerivation rec {
   name = "lxc-0.9.0";
 
   src = fetchurl {
-    url = "http://lxc.sf.net/download/lxc/${name}.tar.gz";
+    url = "mirror://sourceforge/lxc/${name}.tar.gz";
     sha256 = "0821clxymkgp71n720xj5ngs22s2v8jks68f5j4vypycwvm6f5qy";
   };
 
diff --git a/pkgs/tools/networking/aria/default.nix b/pkgs/tools/networking/aria/default.nix
index 120e32ab29cc..4f58463ecf93 100644
--- a/pkgs/tools/networking/aria/default.nix
+++ b/pkgs/tools/networking/aria/default.nix
@@ -4,7 +4,7 @@ let version="0.14.0"; in
 rec {
   src = /* Here a fetchurl expression goes */
   fetchurl {
-    url = "http://downloads.sourceforge.net/aria2/aria2c-${version}.tar.bz2";
+    url = "mirror://sourceforge/aria2/aria2c-${version}.tar.bz2";
     sha256 = "0d6vpy7f4228byahsg4dlhalfkbscx941klhdlxd0y5c3mxxwkfr";
   };
 
diff --git a/pkgs/tools/security/bmrsa/11.nix b/pkgs/tools/security/bmrsa/11.nix
index 3200d27c004b..5d6eaf551734 100644
--- a/pkgs/tools/security/bmrsa/11.nix
+++ b/pkgs/tools/security/bmrsa/11.nix
@@ -11,7 +11,7 @@ let
 in
 rec {
   src = fetchurl {
-    url = "http://prdownloads.sourceforge.net/sourceforge/bmrsa/bmrsa${version}.zip";
+    url = "mirror://sourceforge/bmrsa/bmrsa${version}.zip";
     sha256 = "0ksd9xkvm9lkvj4yl5sl0zmydp1wn3xhc55b28gj70gi4k75kcl4";
   };