diff --git a/pkgs/development/compilers/ghc/8.10.2-binary.nix b/pkgs/development/compilers/ghc/8.10.2-binary.nix
index 02373d00b10f..42103e486055 100644
--- a/pkgs/development/compilers/ghc/8.10.2-binary.nix
+++ b/pkgs/development/compilers/ghc/8.10.2-binary.nix
@@ -31,6 +31,8 @@ let
     else
       "${lib.getLib glibc}/lib/ld-linux*";
 
+  downloadsUrl = "https://downloads.haskell.org/ghc";
+
 in
 
 stdenv.mkDerivation rec {
@@ -41,23 +43,23 @@ stdenv.mkDerivation rec {
   # https://downloads.haskell.org/~ghc/8.10.2/
   src = fetchurl ({
     i686-linux = {
-      url = "http://haskell.org/ghc/dist/${version}/ghc-${version}-i386-deb9-linux.tar.xz";
+      url = "${downloadsUrl}/${version}/ghc-${version}-i386-deb9-linux.tar.xz";
       sha256 = "0bvwisl4w0z5z8z0da10m9sv0mhm9na2qm43qxr8zl23mn32mblx";
     };
     x86_64-linux = {
-      url = "http://haskell.org/ghc/dist/${version}/ghc-${version}-x86_64-deb10-linux.tar.xz";
+      url = "${downloadsUrl}/${version}/ghc-${version}-x86_64-deb10-linux.tar.xz";
       sha256 = "0chnzy9j23b2wa8clx5arwz8wnjfxyjmz9qkj548z14cqf13slcl";
     };
     armv7l-linux = {
-      url = "http://haskell.org/ghc/dist/${version}/ghc-${version}-armv7-deb10-linux.tar.xz";
+      url = "${downloadsUrl}/${version}/ghc-${version}-armv7-deb10-linux.tar.xz";
       sha256 = "1j41cq5d3rmlgz7hzw8f908fs79gc5mn3q5wz277lk8zdf19g75v";
     };
     aarch64-linux = {
-      url = "http://haskell.org/ghc/dist/${version}/ghc-${version}-aarch64-deb10-linux.tar.xz";
+      url = "${downloadsUrl}/${version}/ghc-${version}-aarch64-deb10-linux.tar.xz";
       sha256 = "14smwl3741ixnbgi0l51a7kh7xjkiannfqx15b72svky0y4l3wjw";
     };
     x86_64-darwin = {
-      url = "http://haskell.org/ghc/dist/${version}/ghc-${version}-x86_64-apple-darwin.tar.xz";
+      url = "${downloadsUrl}/${version}/ghc-${version}-x86_64-apple-darwin.tar.xz";
       sha256 = "1hngyq14l4f950hzhh2d204ca2gfc98pc9xdasxihzqd1jq75dzd";
     };
   }.${stdenv.hostPlatform.system}
diff --git a/pkgs/development/compilers/ghc/8.6.5-binary.nix b/pkgs/development/compilers/ghc/8.6.5-binary.nix
index ca984c36957d..7330e3bac2ad 100644
--- a/pkgs/development/compilers/ghc/8.6.5-binary.nix
+++ b/pkgs/development/compilers/ghc/8.6.5-binary.nix
@@ -28,6 +28,8 @@ let
     else
       "${lib.getLib glibc}/lib/ld-linux*";
 
+  downloadsUrl = "https://downloads.haskell.org/ghc";
+
 in
 
 stdenv.mkDerivation rec {
@@ -39,22 +41,22 @@ stdenv.mkDerivation rec {
   src = fetchurl ({
     i686-linux = {
       # Don't use the Fedora27 build (as below) because there isn't one!
-      url = "http://haskell.org/ghc/dist/${version}/ghc-${version}-i386-deb9-linux.tar.xz";
+      url = "${downloadsUrl}/${version}/ghc-${version}-i386-deb9-linux.tar.xz";
       sha256 = "1p2h29qghql19ajk755xa0yxkn85slbds8m9n5196ris743vkp8w";
     };
     x86_64-linux = {
       # This is the Fedora build because it links against ncurses6 where the
       # deb9 one links against ncurses5, see here
       # https://github.com/NixOS/nixpkgs/issues/85924 for a discussion
-      url = "http://haskell.org/ghc/dist/${version}/ghc-${version}-x86_64-fedora27-linux.tar.xz";
+      url = "${downloadsUrl}/${version}/ghc-${version}-x86_64-fedora27-linux.tar.xz";
       sha256 = "18dlqm5d028fqh6ghzn7pgjspr5smw030jjzl3kq6q1kmwzbay6g";
     };
     aarch64-linux = {
-      url = "http://haskell.org/ghc/dist/${version}/ghc-${version}-aarch64-ubuntu18.04-linux.tar.xz";
+      url = "${downloadsUrl}/${version}/ghc-${version}-aarch64-ubuntu18.04-linux.tar.xz";
       sha256 = "11n7l2a36i5vxzzp85la2555q4m34l747g0pnmd81cp46y85hlhq";
     };
     x86_64-darwin = {
-      url = "http://haskell.org/ghc/dist/${version}/ghc-${version}-x86_64-apple-darwin.tar.xz";
+      url = "${downloadsUrl}/${version}/ghc-${version}-x86_64-apple-darwin.tar.xz";
       sha256 = "0s9188vhhgf23q3rjarwhbr524z6h2qga5xaaa2pma03sfqvvhfz";
     };
   }.${stdenv.hostPlatform.system}