diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 09d8b5c0ec7..df184527baf 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -174,7 +174,7 @@ let pythonPackages = python.modules // rec {
     name = "logilab-astng-0.21.1";
 
     src = fetchurl {
-      url = "http://ftp.logilab.org/pub/astng/${name}.tar.gz";
+      url = "ftp://ftp.logilab.org/pub/astng/${name}.tar.gz";
       sha256 = "0rqp2vwrnv6gkzdd96j078h1sz26plh49cmnyswy2wb6l4wans67";
     };
     propagatedBuildInputs = [logilabCommon];
@@ -821,7 +821,7 @@ let pythonPackages = python.modules // rec {
     name = "logilab-common-0.56.0";
 
     src = fetchurl {
-      url = "http://ftp.logilab.org/pub/common/${name}.tar.gz";
+      url = "ftp://ftp.logilab.org/pub/common/${name}.tar.gz";
       sha256 = "14p557nqypbd10d8k7qs6jlm58pksiwh86wvvl0axyki00hj6971";
     };
     propagatedBuildInputs = [unittest2];
@@ -1559,7 +1559,7 @@ let pythonPackages = python.modules // rec {
     name = "pylint-0.23.0";
 
     src = fetchurl {
-      url = "http://ftp.logilab.org/pub/pylint/${name}.tar.gz";
+      url = "ftp://ftp.logilab.org/pub/pylint/${name}.tar.gz";
       sha256 = "07091avcc2b374i5f3blszmawjcin8xssjfryz91qbxybb8r7c6d";
     };
     propagatedBuildInputs = [astng];