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-rw-r--r--pkgs/applications/science/biology/igv/default.nix2
-rw-r--r--pkgs/applications/science/biology/iv/default.nix2
-rw-r--r--pkgs/applications/science/biology/neuron/default.nix2
-rw-r--r--pkgs/applications/science/electronics/verilator/default.nix2
-rw-r--r--pkgs/applications/science/logic/coq/8.3.nix2
-rw-r--r--pkgs/applications/science/logic/coq/8.4.nix2
-rw-r--r--pkgs/applications/science/logic/cvc4/default.nix2
-rw-r--r--pkgs/applications/science/logic/eprover/default.nix2
-rw-r--r--pkgs/applications/science/logic/isabelle/default.nix2
-rw-r--r--pkgs/applications/science/logic/leo2/default.nix2
-rw-r--r--pkgs/applications/science/logic/mcrl2/default.nix2
-rw-r--r--pkgs/applications/science/logic/prooftree/default.nix2
-rw-r--r--pkgs/applications/science/logic/prover9/default.nix2
-rw-r--r--pkgs/applications/science/logic/satallax/default.nix2
-rw-r--r--pkgs/applications/science/math/R/default.nix2
-rw-r--r--pkgs/applications/science/math/cbc/default.nix2
-rw-r--r--pkgs/applications/science/math/csdp/default.nix2
-rw-r--r--pkgs/applications/science/math/glsurf/default.nix2
-rw-r--r--pkgs/applications/science/math/pari/default.nix2
-rw-r--r--pkgs/applications/science/math/pari/gp2c.nix2
-rw-r--r--pkgs/applications/science/math/sage/default.nix24
-rw-r--r--pkgs/applications/science/math/scilab-bin/default.nix2
-rw-r--r--pkgs/applications/science/math/scilab/default.nix2
-rw-r--r--pkgs/applications/science/math/scotch/default.nix2
-rw-r--r--pkgs/applications/science/physics/sacrifice/default.nix2
-rw-r--r--pkgs/applications/science/physics/sherpa/default.nix2
-rw-r--r--pkgs/applications/science/robotics/gazebo/default.nix2
27 files changed, 38 insertions, 38 deletions
diff --git a/pkgs/applications/science/biology/igv/default.nix b/pkgs/applications/science/biology/igv/default.nix
index bf963958406d7..753f80d617331 100644
--- a/pkgs/applications/science/biology/igv/default.nix
+++ b/pkgs/applications/science/biology/igv/default.nix
@@ -5,7 +5,7 @@ stdenv.mkDerivation rec {
   version = "2.4.10";
 
   src = fetchurl {
-    url = "http://data.broadinstitute.org/igv/projects/downloads/2.4/IGV_${version}.zip";
+    url = "https://data.broadinstitute.org/igv/projects/downloads/2.4/IGV_${version}.zip";
     sha256 = "1wyv3ny06m6ipb83hi3pzcc50v49zms69c5714iixh0nqpd826f2";
   };
 
diff --git a/pkgs/applications/science/biology/iv/default.nix b/pkgs/applications/science/biology/iv/default.nix
index 2258482bd4b2c..f204d9bbca961 100644
--- a/pkgs/applications/science/biology/iv/default.nix
+++ b/pkgs/applications/science/biology/iv/default.nix
@@ -5,7 +5,7 @@
 stdenv.mkDerivation rec
   { name = "iv-19";
     src = fetchurl
-      { url = "http://www.neuron.yale.edu/ftp/neuron/versions/v${neuron-version}/${name}.tar.gz";
+      { url = "https://www.neuron.yale.edu/ftp/neuron/versions/v${neuron-version}/${name}.tar.gz";
         sha256 = "07a3g8zzay4h0bls7fh89dd0phn7s34c2g15pij6dsnwpmjg06yx";
       };
     nativeBuildInputs = [ patchelf ];
diff --git a/pkgs/applications/science/biology/neuron/default.nix b/pkgs/applications/science/biology/neuron/default.nix
index 7fa229c42b10e..35710fd1fe1fc 100644
--- a/pkgs/applications/science/biology/neuron/default.nix
+++ b/pkgs/applications/science/biology/neuron/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ ncurses readline python mpi iv ];
 
   src = fetchurl {
-    url = "http://www.neuron.yale.edu/ftp/neuron/versions/v${version}/nrn-${version}.tar.gz";
+    url = "https://www.neuron.yale.edu/ftp/neuron/versions/v${version}/nrn-${version}.tar.gz";
     sha256 = "0f26v3qvzblcdjg7isq0m9j2q8q7x3vhmkfllv8lsr3gyj44lljf";
   };
 
diff --git a/pkgs/applications/science/electronics/verilator/default.nix b/pkgs/applications/science/electronics/verilator/default.nix
index 205d56f3fc876..9ecc9f20ac162 100644
--- a/pkgs/applications/science/electronics/verilator/default.nix
+++ b/pkgs/applications/science/electronics/verilator/default.nix
@@ -5,7 +5,7 @@ stdenv.mkDerivation rec {
   version = "3.924";
 
   src = fetchurl {
-    url    = "http://www.veripool.org/ftp/${name}.tgz";
+    url    = "https://www.veripool.org/ftp/${name}.tgz";
     sha256 = "0xarifraycmdzjxs0lscpwvrwr59z84p8g8dkyjssc463dqikjvx";
   };
 
diff --git a/pkgs/applications/science/logic/coq/8.3.nix b/pkgs/applications/science/logic/coq/8.3.nix
index 87b847087e348..341267b2cebe3 100644
--- a/pkgs/applications/science/logic/coq/8.3.nix
+++ b/pkgs/applications/science/logic/coq/8.3.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation {
   name = "coq-${version}";
 
   src = fetchurl {
-    url = "http://coq.inria.fr/V${version}/files/coq-${version}.tar.gz";
+    url = "https://coq.inria.fr/V${version}/files/coq-${version}.tar.gz";
     sha256 = "17d3lmchmqir1rawnr52g78srg4wkd7clzpzfsivxc4y1zp6rwkr";
   };
 
diff --git a/pkgs/applications/science/logic/coq/8.4.nix b/pkgs/applications/science/logic/coq/8.4.nix
index 64b0f85aed2ad..c3da1205ab0cb 100644
--- a/pkgs/applications/science/logic/coq/8.4.nix
+++ b/pkgs/applications/science/logic/coq/8.4.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation {
   inherit ocaml camlp5;
 
   src = fetchurl {
-    url = "http://coq.inria.fr/distrib/V${version}/files/coq-${version}.tar.gz";
+    url = "https://coq.inria.fr/distrib/V${version}/files/coq-${version}.tar.gz";
     sha256 = "1mpbj4yf36kpjg2v2sln12i8dzqn8rag6fd07hslj2lpm4qs4h55";
   };
 
diff --git a/pkgs/applications/science/logic/cvc4/default.nix b/pkgs/applications/science/logic/cvc4/default.nix
index 403eff216f53c..91ea7e5001445 100644
--- a/pkgs/applications/science/logic/cvc4/default.nix
+++ b/pkgs/applications/science/logic/cvc4/default.nix
@@ -8,7 +8,7 @@ stdenv.mkDerivation rec {
   version = "1.5";
 
   src = fetchurl {
-    url = "http://cvc4.cs.stanford.edu/downloads/builds/src/cvc4-${version}.tar.gz";
+    url = "https://cvc4.cs.stanford.edu/downloads/builds/src/cvc4-${version}.tar.gz";
     sha256 = "0yxxawgc9vd2cz883swjlm76rbdkj48n7a8dfppsami530y2rvhi";
   };
 
diff --git a/pkgs/applications/science/logic/eprover/default.nix b/pkgs/applications/science/logic/eprover/default.nix
index 44328eeb6bbb7..9b0ba0799c783 100644
--- a/pkgs/applications/science/logic/eprover/default.nix
+++ b/pkgs/applications/science/logic/eprover/default.nix
@@ -5,7 +5,7 @@ stdenv.mkDerivation rec {
   version = "2.0";
 
   src = fetchurl {
-    url = "http://wwwlehre.dhbw-stuttgart.de/~sschulz/WORK/E_DOWNLOAD/V_${version}/E.tgz";
+    url = "https://wwwlehre.dhbw-stuttgart.de/~sschulz/WORK/E_DOWNLOAD/V_${version}/E.tgz";
     sha256 = "1xmwr32pd8lv3f6yh720mdqhi3na505y3zbgcsgh2hwb7b5i3ngb";
   };
 
diff --git a/pkgs/applications/science/logic/isabelle/default.nix b/pkgs/applications/science/logic/isabelle/default.nix
index af2bb3ed0c4e4..ae04c11d95906 100644
--- a/pkgs/applications/science/logic/isabelle/default.nix
+++ b/pkgs/applications/science/logic/isabelle/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation {
       sha256 = "1awgg39i72pivwfijdwffvil3glnpimjz2x04qbl5la2j6la48nb";
     }
     else fetchurl {
-      url = "http://isabelle.in.tum.de/website-${dirname}/dist/${dirname}_linux.tar.gz";
+      url = "https://isabelle.in.tum.de/website-${dirname}/dist/${dirname}_linux.tar.gz";
       sha256 = "01v1zrajyfamjq5b8v18qr3ffivjckifsvvx2vs13di6wsnmm9gw";
     };
 
diff --git a/pkgs/applications/science/logic/leo2/default.nix b/pkgs/applications/science/logic/leo2/default.nix
index e308953462588..be337a1c258e7 100644
--- a/pkgs/applications/science/logic/leo2/default.nix
+++ b/pkgs/applications/science/logic/leo2/default.nix
@@ -5,7 +5,7 @@ stdenv.mkDerivation rec {
   version = "1.6.2";
 
   src = fetchurl {
-    url = "http://page.mi.fu-berlin.de/cbenzmueller/leo/leo2_v${version}.tgz";
+    url = "https://page.mi.fu-berlin.de/cbenzmueller/leo/leo2_v${version}.tgz";
     sha256 = "1wjpmizb181iygnd18lx7p77fwaci2clgzs5ix5j51cc8f3pazmv";
   };
 
diff --git a/pkgs/applications/science/logic/mcrl2/default.nix b/pkgs/applications/science/logic/mcrl2/default.nix
index ec717002c2d66..6d9549b526f9b 100644
--- a/pkgs/applications/science/logic/mcrl2/default.nix
+++ b/pkgs/applications/science/logic/mcrl2/default.nix
@@ -7,7 +7,7 @@ stdenv.mkDerivation rec {
   name = "mcrl2-${version}";
 
   src = fetchurl {
-    url = "http://www.mcrl2.org/download/release/mcrl2-${version}.${build_nr}.tar.gz";
+    url = "https://www.mcrl2.org/download/release/mcrl2-${version}.${build_nr}.tar.gz";
     sha256 = "1c8h94ja7271ph61zrcgnjgblxppld6v22f7f900prjgzbcfy14m";
   };
 
diff --git a/pkgs/applications/science/logic/prooftree/default.nix b/pkgs/applications/science/logic/prooftree/default.nix
index b143fd9825057..01dfc35f6e0d0 100644
--- a/pkgs/applications/science/logic/prooftree/default.nix
+++ b/pkgs/applications/science/logic/prooftree/default.nix
@@ -5,7 +5,7 @@ stdenv.mkDerivation (rec {
   version = "0.12";
 
   src = fetchurl {
-    url = "http://askra.de/software/prooftree/releases/prooftree-${version}.tar.gz";
+    url = "https://askra.de/software/prooftree/releases/prooftree-${version}.tar.gz";
     sha256 = "08yp66j05pdkdpv9xkfqymqy82mir5xbwfh9mkzhh219xkps4b4m";
   };
 
diff --git a/pkgs/applications/science/logic/prover9/default.nix b/pkgs/applications/science/logic/prover9/default.nix
index 74e31d062f484..f96532b7038bd 100644
--- a/pkgs/applications/science/logic/prover9/default.nix
+++ b/pkgs/applications/science/logic/prover9/default.nix
@@ -4,7 +4,7 @@ stdenv.mkDerivation {
   name = "prover9-2009-11a";
 
   src = fetchurl {
-    url = http://www.cs.unm.edu/~mccune/mace4/download/LADR-2009-11A.tar.gz;
+    url = https://www.cs.unm.edu/~mccune/mace4/download/LADR-2009-11A.tar.gz;
     sha256 = "1l2i3d3h5z7nnbzilb6z92r0rbx0kh6yaxn2c5qhn3000xcfsay3";
   };
 
diff --git a/pkgs/applications/science/logic/satallax/default.nix b/pkgs/applications/science/logic/satallax/default.nix
index c22bff9cdee24..b9dd90f601f51 100644
--- a/pkgs/applications/science/logic/satallax/default.nix
+++ b/pkgs/applications/science/logic/satallax/default.nix
@@ -5,7 +5,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ocaml zlib which eprover makeWrapper coq];
   src = fetchurl {
-    url = "http://www.ps.uni-saarland.de/~cebrown/satallax/downloads/${name}.tar.gz";
+    url = "https://www.ps.uni-saarland.de/~cebrown/satallax/downloads/${name}.tar.gz";
     sha256 = "1kvxn8mc35igk4vigi5cp7w3wpxk2z3bgwllfm4n3h2jfs0vkpib";
   };
 
diff --git a/pkgs/applications/science/math/R/default.nix b/pkgs/applications/science/math/R/default.nix
index 953f4e62c22b8..f20b75605d5a7 100644
--- a/pkgs/applications/science/math/R/default.nix
+++ b/pkgs/applications/science/math/R/default.nix
@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
   name = "R-3.5.0";
 
   src = fetchurl {
-    url = "http://cran.r-project.org/src/base/R-3/${name}.tar.gz";
+    url = "https://cran.r-project.org/src/base/R-3/${name}.tar.gz";
     sha256 = "0w38865laqg28cdhikxdxhx4rfp0kgcn72gakwypsy91br9ja5zx";
   };
 
diff --git a/pkgs/applications/science/math/cbc/default.nix b/pkgs/applications/science/math/cbc/default.nix
index 6de77d81be6f8..689261abc661f 100644
--- a/pkgs/applications/science/math/cbc/default.nix
+++ b/pkgs/applications/science/math/cbc/default.nix
@@ -4,7 +4,7 @@ stdenv.mkDerivation {
   name = "cbc-2.9.9";
 
   src = fetchurl {
-    url = "http://www.coin-or.org/download/source/Cbc/Cbc-2.9.9.tgz";
+    url = "https://www.coin-or.org/download/source/Cbc/Cbc-2.9.9.tgz";
     sha256 = "1w8axdzm05xf5y13c31w7rc5z6ywxqxiwafnxcq3p195kgj0915a";
   };
 
diff --git a/pkgs/applications/science/math/csdp/default.nix b/pkgs/applications/science/math/csdp/default.nix
index 796e8b7264fbf..9b402fe0ac941 100644
--- a/pkgs/applications/science/math/csdp/default.nix
+++ b/pkgs/applications/science/math/csdp/default.nix
@@ -4,7 +4,7 @@ stdenv.mkDerivation {
   name = "csdp-6.1.1";
 
   src = fetchurl {
-    url = "http://www.coin-or.org/download/source/Csdp/Csdp-6.1.1.tgz";
+    url = "https://www.coin-or.org/download/source/Csdp/Csdp-6.1.1.tgz";
     sha256 = "1f9ql6cjy2gwiyc51ylfan24v1ca9sjajxkbhszlds1lqmma8n05";
   };
 
diff --git a/pkgs/applications/science/math/glsurf/default.nix b/pkgs/applications/science/math/glsurf/default.nix
index 798141b6b4383..a538293470538 100644
--- a/pkgs/applications/science/math/glsurf/default.nix
+++ b/pkgs/applications/science/math/glsurf/default.nix
@@ -6,7 +6,7 @@ stdenv.mkDerivation {
   name = "glsurf-3.3.1";
 
   src = fetchurl {
-    url = "http://lama.univ-savoie.fr/~raffalli/glsurf/glsurf-3.3.1.tar.gz";
+    url = "https://lama.univ-savoie.fr/~raffalli/glsurf/glsurf-3.3.1.tar.gz";
     sha256 = "0w8xxfnw2snflz8wdr2ca9f5g91w5vbyp1hwlx1v7vg83d4bwqs7";
   };
 
diff --git a/pkgs/applications/science/math/pari/default.nix b/pkgs/applications/science/math/pari/default.nix
index 07c6af0926d66..a811c9da8c27e 100644
--- a/pkgs/applications/science/math/pari/default.nix
+++ b/pkgs/applications/science/math/pari/default.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
   version = "2.9.5";
 
   src = fetchurl {
-    url = "http://pari.math.u-bordeaux.fr/pub/pari/unix/${name}.tar.gz";
+    url = "https://pari.math.u-bordeaux.fr/pub/pari/unix/${name}.tar.gz";
     sha256 = "05z6y5iwdzcdggbrkic9cy9vy9wmk5qxc21cb4lqnbqxnhjihibb";
   };
 
diff --git a/pkgs/applications/science/math/pari/gp2c.nix b/pkgs/applications/science/math/pari/gp2c.nix
index b3e36b6bf2060..10b0d0cba36d2 100644
--- a/pkgs/applications/science/math/pari/gp2c.nix
+++ b/pkgs/applications/science/math/pari/gp2c.nix
@@ -7,7 +7,7 @@ stdenv.mkDerivation rec {
   version = "0.0.10pl1";
 
   src = fetchurl {
-    url = "http://pari.math.u-bordeaux.fr/pub/pari/GP2C/${name}.tar.gz";
+    url = "https://pari.math.u-bordeaux.fr/pub/pari/GP2C/${name}.tar.gz";
     sha256 = "16hgmdvzxbmv63x1f72q1xgfyh0qhx7kaf9nbaamy0gdawxjxcav";
   };
 
diff --git a/pkgs/applications/science/math/sage/default.nix b/pkgs/applications/science/math/sage/default.nix
index b74bcc3d63772..7f101bac147e2 100644
--- a/pkgs/applications/science/math/sage/default.nix
+++ b/pkgs/applications/science/math/sage/default.nix
@@ -52,26 +52,26 @@ stdenv.mkDerivation rec {
       "http://sagemath.polytechnic.edu.na/src/sage-${version}.tar.gz"
       "ftp://ftp.sun.ac.za/pub/mirrors/www.sagemath.org/src/sage-${version}.tar.gz"
       "http://sagemath.mirror.ac.za/src/sage-${version}.tar.gz"
-      "http://ftp.leg.uct.ac.za/pub/packages/sage/src/sage-${version}.tar.gz"
+      "https://ftp.leg.uct.ac.za/pub/packages/sage/src/sage-${version}.tar.gz"
       "http://mirror.ufs.ac.za/sagemath/src/sage-${version}.tar.gz"
-      "http://mirrors-usa.go-parts.com/sage/sagemath/src/sage-${version}.tar.gz"
+      "https://mirrors-usa.go-parts.com/sage/sagemath/src/sage-${version}.tar.gz"
       "http://www.cecm.sfu.ca/sage/src/sage-${version}.tar.gz"
       "http://files.sagemath.org/src/sage-${version}.tar.gz"
-      "http://mirrors.xmission.com/sage/src/sage-${version}.tar.gz"
+      "https://mirrors.xmission.com/sage/src/sage-${version}.tar.gz"
       "http://sagemath.c3sl.ufpr.br/src/sage-${version}.tar.gz"
       "http://linorg.usp.br/sage/src/sage-${version}.tar.gz"
       "http://mirror.hust.edu.cn/sagemath/src/sage-${version}.tar.gz"
-      "http://ftp.iitm.ac.in/sage/src/sage-${version}.tar.gz"
+      "https://ftp.iitm.ac.in/sage/src/sage-${version}.tar.gz"
       "http://ftp.kaist.ac.kr/sage/src/sage-${version}.tar.gz"
-      "http://ftp.riken.jp/sagemath/src/sage-${version}.tar.gz"
-      "http://mirrors.tuna.tsinghua.edu.cn/sagemath/src/sage-${version}.tar.gz"
-      "http://mirrors.ustc.edu.cn/sagemath/src/sage-${version}.tar.gz"
+      "https://ftp.riken.jp/sagemath/src/sage-${version}.tar.gz"
+      "https://mirrors.tuna.tsinghua.edu.cn/sagemath/src/sage-${version}.tar.gz"
+      "https://mirrors.ustc.edu.cn/sagemath/src/sage-${version}.tar.gz"
       "http://ftp.tsukuba.wide.ad.jp/software/sage/src/sage-${version}.tar.gz"
-      "http://ftp.yz.yamagata-u.ac.jp/pub/math/sage/src/sage-${version}.tar.gz"
-      "http://mirror.yandex.ru/mirrors/sage.math.washington.edu/src/sage-${version}.tar.gz"
-      "http://mirror.aarnet.edu.au/pub/sage/src/sage-${version}.tar.gz"
-      "http://sage.mirror.garr.it/mirrors/sage/src/sage-${version}.tar.gz"
-      "http://www.mirrorservice.org/sites/www.sagemath.org/src/sage-${version}.tar.gz"
+      "https://ftp.yz.yamagata-u.ac.jp/pub/math/sage/src/sage-${version}.tar.gz"
+      "https://mirror.yandex.ru/mirrors/sage.math.washington.edu/src/sage-${version}.tar.gz"
+      "https://mirror.aarnet.edu.au/pub/sage/src/sage-${version}.tar.gz"
+      "https://sage.mirror.garr.it/mirrors/sage/src/sage-${version}.tar.gz"
+      "https://www.mirrorservice.org/sites/www.sagemath.org/src/sage-${version}.tar.gz"
       "http://mirror.switch.ch/mirror/sagemath/src/sage-${version}.tar.gz"
       "https://mirrors.up.pt/pub/sage/src/sage-${version}.tar.gz"
       "http://www-ftp.lip6.fr/pub/math/sagemath/src/sage-${version}.tar.gz"
diff --git a/pkgs/applications/science/math/scilab-bin/default.nix b/pkgs/applications/science/math/scilab-bin/default.nix
index 154f1ba39e3c6..ad0231d37b0ee 100644
--- a/pkgs/applications/science/math/scilab-bin/default.nix
+++ b/pkgs/applications/science/math/scilab-bin/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
   inherit name;
 
   src = fetchurl {
-    url = "http://www.scilab.org/download/${ver}/scilab-${ver}.bin.linux-${architecture}.tar.gz";
+    url = "https://www.scilab.org/download/${ver}/scilab-${ver}.bin.linux-${architecture}.tar.gz";
     sha256 =
       if stdenv.system == "i686-linux" then
         "6143a95ded40411a35630a89b365875a6526cd4db1e2865ac5612929a7db937a"
diff --git a/pkgs/applications/science/math/scilab/default.nix b/pkgs/applications/science/math/scilab/default.nix
index bb52b430f8cb2..fcdbb6b985d69 100644
--- a/pkgs/applications/science/math/scilab/default.nix
+++ b/pkgs/applications/science/math/scilab/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
   version = "4.1.2";
   name = "scilab-${version}";
   src = fetchurl {
-    url = "http://www.scilab.org/download/${version}/${name}-src.tar.gz";
+    url = "https://www.scilab.org/download/${version}/${name}-src.tar.gz";
     sha256 = "1adk6jqlj7i3gjklvlf1j3il1nb22axnp4rvwl314an62siih0sc";
   };
 
diff --git a/pkgs/applications/science/math/scotch/default.nix b/pkgs/applications/science/math/scotch/default.nix
index 3b01c684d529b..8fa020ba07c97 100644
--- a/pkgs/applications/science/math/scotch/default.nix
+++ b/pkgs/applications/science/math/scotch/default.nix
@@ -8,7 +8,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ bison openmpi flex zlib ];
 
   src = fetchurl {
-    url = "http://gforge.inria.fr/frs/download.php/file/34618/${src_name}.tar.gz";
+    url = "https://gforge.inria.fr/frs/download.php/file/34618/${src_name}.tar.gz";
     sha256 = "f53f4d71a8345ba15e2dd4e102a35fd83915abf50ea73e1bf6efe1bc2b4220c7";
   };
 
diff --git a/pkgs/applications/science/physics/sacrifice/default.nix b/pkgs/applications/science/physics/sacrifice/default.nix
index 6c25f720ebf96..64b88dcc3d4fc 100644
--- a/pkgs/applications/science/physics/sacrifice/default.nix
+++ b/pkgs/applications/science/physics/sacrifice/default.nix
@@ -5,7 +5,7 @@ stdenv.mkDerivation rec {
   version = "1.0.0";
 
   src = fetchurl {
-    url = "http://www.hepforge.org/archive/agile/Sacrifice-1.0.0.tar.gz";
+    url = "https://www.hepforge.org/archive/agile/Sacrifice-1.0.0.tar.gz";
     sha256 = "10bvpq63kmszy1habydwncm0j1dgvam0fkrmvkgbkvf804dcjp6g";
   };
 
diff --git a/pkgs/applications/science/physics/sherpa/default.nix b/pkgs/applications/science/physics/sherpa/default.nix
index 340428e8e7770..66a9bebacf0dd 100644
--- a/pkgs/applications/science/physics/sherpa/default.nix
+++ b/pkgs/applications/science/physics/sherpa/default.nix
@@ -5,7 +5,7 @@ stdenv.mkDerivation rec {
   version = "2.2.5";
 
   src = fetchurl {
-    url = "http://www.hepforge.org/archive/sherpa/SHERPA-MC-${version}.tar.gz";
+    url = "https://www.hepforge.org/archive/sherpa/SHERPA-MC-${version}.tar.gz";
     sha256 = "0rv14j8gvjjr3darb0wcradlmsnyq915jz7v2yybrjzqfbsr3zb5";
   };
 
diff --git a/pkgs/applications/science/robotics/gazebo/default.nix b/pkgs/applications/science/robotics/gazebo/default.nix
index 3edf75a4bffe9..1d933d569486f 100644
--- a/pkgs/applications/science/robotics/gazebo/default.nix
+++ b/pkgs/applications/science/robotics/gazebo/default.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
   name = "gazebo-${version}";
 
   src = fetchurl {
-    url = "http://osrf-distributions.s3.amazonaws.com/gazebo/releases/${name}.tar.bz2";
+    url = "https://osrf-distributions.s3.amazonaws.com/gazebo/releases/${name}.tar.bz2";
     sha256 = src-sha256;
   };