4 files changed, 4 insertions, 4 deletions
diff --git a/pkgs/tools/compression/bsdiff/default.nix b/pkgs/tools/compression/bsdiff/default.nix
index 095bd5f7d9a57..617d86e7f1e3a 100644
--- a/pkgs/tools/compression/bsdiff/default.nix
+++ b/pkgs/tools/compression/bsdiff/default.nix
@@ -5,7 +5,7 @@ stdenv.mkDerivation rec {
   version = "4.3";
 
   src = fetchurl {
-    url    = "http://www.daemonology.net/bsdiff/${name}.tar.gz";
+    url    = "https://www.daemonology.net/bsdiff/${name}.tar.gz";
     sha256 = "0j2zm3z271x5aw63mwhr3vymzn45p2vvrlrpm9cz2nywna41b0hq";
   };
 
diff --git a/pkgs/tools/compression/dtrx/default.nix b/pkgs/tools/compression/dtrx/default.nix
index 91f7637e1bcbe..c9ec557ab1f4b 100644
--- a/pkgs/tools/compression/dtrx/default.nix
+++ b/pkgs/tools/compression/dtrx/default.nix
@@ -16,7 +16,7 @@ in pythonPackages.buildPythonApplication rec {
   version = "7.1";
 
   src = fetchurl {
-    url = "http://brettcsmith.org/2007/dtrx/dtrx-${version}.tar.gz";
+    url = "https://brettcsmith.org/2007/dtrx/dtrx-${version}.tar.gz";
     sha256 = "15yf4n27zbhvv0byfv3i89wl5zn6jc2wbc69lk5a3m6rx54gx6hw";
   };
 
diff --git a/pkgs/tools/compression/lzop/default.nix b/pkgs/tools/compression/lzop/default.nix
index 72be1d28d2488..00eb5f265aafe 100644
--- a/pkgs/tools/compression/lzop/default.nix
+++ b/pkgs/tools/compression/lzop/default.nix
@@ -3,7 +3,7 @@
 stdenv.mkDerivation rec {
   name = "lzop-1.04";
   src = fetchurl {
-    url = "http://www.lzop.org/download/${name}.tar.gz";
+    url = "https://www.lzop.org/download/${name}.tar.gz";
     sha256 = "0h9gb8q7y54m9mvy3jvsmxf21yx8fc3ylzh418hgbbv0i8mbcwky";
   };
 
diff --git a/pkgs/tools/compression/pigz/default.nix b/pkgs/tools/compression/pigz/default.nix
index 732aa691d4a94..a2668f73ceb26 100644
--- a/pkgs/tools/compression/pigz/default.nix
+++ b/pkgs/tools/compression/pigz/default.nix
@@ -7,7 +7,7 @@ stdenv.mkDerivation {
   name = name + "-" + version;
 
   src = fetchurl {
-    url = "http://www.zlib.net/${name}/${name}-${version}.tar.gz";
+    url = "https://www.zlib.net/${name}/${name}-${version}.tar.gz";
     sha256 = "0wsgw5vwl23jrnpsvd8v3xcp5k4waw5mk0164fynjhkv58i1dy54";
   };