diff --git a/pkgs/development/compilers/llvm/10/clang/default.nix b/pkgs/development/compilers/llvm/10/clang/default.nix
index 61008b5c12a..9b63b772ac0 100644
--- a/pkgs/development/compilers/llvm/10/clang/default.nix
+++ b/pkgs/development/compilers/llvm/10/clang/default.nix
@@ -95,7 +95,7 @@ let
 
     meta = {
       description = "A c, c++, objective-c, and objective-c++ frontend for the llvm compiler";
-      homepage    = http://llvm.org/;
+      homepage    = https://llvm.org/;
       license     = stdenv.lib.licenses.ncsa;
       platforms   = stdenv.lib.platforms.all;
     };
diff --git a/pkgs/development/compilers/llvm/10/libc++/default.nix b/pkgs/development/compilers/llvm/10/libc++/default.nix
index 9e3529a046f..df009775978 100644
--- a/pkgs/development/compilers/llvm/10/libc++/default.nix
+++ b/pkgs/development/compilers/llvm/10/libc++/default.nix
@@ -47,7 +47,7 @@ stdenv.mkDerivation {
   ];
 
   meta = {
-    homepage = http://libcxx.llvm.org/;
+    homepage = https://libcxx.llvm.org/;
     description = "A new implementation of the C++ standard library, targeting C++11";
     license = with stdenv.lib.licenses; [ ncsa mit ];
     platforms = stdenv.lib.platforms.all;
diff --git a/pkgs/development/compilers/llvm/10/libc++abi.nix b/pkgs/development/compilers/llvm/10/libc++abi.nix
index b58c12bd9ab..5af88369e78 100644
--- a/pkgs/development/compilers/llvm/10/libc++abi.nix
+++ b/pkgs/development/compilers/llvm/10/libc++abi.nix
@@ -40,7 +40,7 @@ stdenv.mkDerivation {
         # this should be done in CMake, but having trouble figuring out
         # the magic combination of necessary CMake variables
         # if you fancy a try, take a look at
-        # http://www.cmake.org/Wiki/CMake_RPATH_handling
+        # https://gitlab.kitware.com/cmake/community/-/wikis/doc/cmake/RPATH-handling
         install_name_tool -id $out/$file $file
       done
       make install
@@ -58,7 +58,7 @@ stdenv.mkDerivation {
     '';
 
   meta = {
-    homepage = http://libcxxabi.llvm.org/;
+    homepage = https://libcxxabi.llvm.org/;
     description = "A new implementation of low level support for a standard C++ library";
     license = with stdenv.lib.licenses; [ ncsa mit ];
     maintainers = with stdenv.lib.maintainers; [ vlstill ];
diff --git a/pkgs/development/compilers/llvm/10/lld.nix b/pkgs/development/compilers/llvm/10/lld.nix
index 4bde3d74636..672105d7c50 100644
--- a/pkgs/development/compilers/llvm/10/lld.nix
+++ b/pkgs/development/compilers/llvm/10/lld.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "The LLVM Linker";
-    homepage    = http://lld.llvm.org/;
+    homepage    = https://lld.llvm.org/;
     license     = stdenv.lib.licenses.ncsa;
     platforms   = stdenv.lib.platforms.all;
   };
diff --git a/pkgs/development/compilers/llvm/10/lldb.nix b/pkgs/development/compilers/llvm/10/lldb.nix
index 46c991de817..6f83f5a2342 100644
--- a/pkgs/development/compilers/llvm/10/lldb.nix
+++ b/pkgs/development/compilers/llvm/10/lldb.nix
@@ -71,7 +71,7 @@ stdenv.mkDerivation (rec {
 
   meta = with stdenv.lib; {
     description = "A next-generation high-performance debugger";
-    homepage = http://lldb.llvm.org;
+    homepage = https://lldb.llvm.org;
     license = licenses.ncsa;
     platforms = platforms.all;
   };
diff --git a/pkgs/development/compilers/llvm/10/llvm.nix b/pkgs/development/compilers/llvm/10/llvm.nix
index 73265419cfb..9c8f4c5afcd 100644
--- a/pkgs/development/compilers/llvm/10/llvm.nix
+++ b/pkgs/development/compilers/llvm/10/llvm.nix
@@ -161,7 +161,7 @@ in stdenv.mkDerivation (rec {
 
   meta = {
     description = "Collection of modular and reusable compiler and toolchain technologies";
-    homepage    = http://llvm.org/;
+    homepage    = https://llvm.org/;
     license     = stdenv.lib.licenses.ncsa;
     maintainers = with stdenv.lib.maintainers; [ lovek323 raskin dtzWill ];
     platforms   = stdenv.lib.platforms.all;
diff --git a/pkgs/development/compilers/llvm/10/openmp.nix b/pkgs/development/compilers/llvm/10/openmp.nix
index 4dd45ba94e6..f0229d0b48e 100644
--- a/pkgs/development/compilers/llvm/10/openmp.nix
+++ b/pkgs/development/compilers/llvm/10/openmp.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Components required to build an executable OpenMP program";
-    homepage    = http://openmp.llvm.org/;
+    homepage    = https://openmp.llvm.org/;
     license     = stdenv.lib.licenses.mit;
     platforms   = stdenv.lib.platforms.all;
   };
diff --git a/pkgs/development/compilers/llvm/5/clang/default.nix b/pkgs/development/compilers/llvm/5/clang/default.nix
index e391ce046db..90a7ad966ce 100644
--- a/pkgs/development/compilers/llvm/5/clang/default.nix
+++ b/pkgs/development/compilers/llvm/5/clang/default.nix
@@ -83,7 +83,7 @@ let
 
     meta = {
       description = "A c, c++, objective-c, and objective-c++ frontend for the llvm compiler";
-      homepage    = http://llvm.org/;
+      homepage    = https://llvm.org/;
       license     = stdenv.lib.licenses.ncsa;
       platforms   = stdenv.lib.platforms.all;
     };
diff --git a/pkgs/development/compilers/llvm/5/libc++/default.nix b/pkgs/development/compilers/llvm/5/libc++/default.nix
index b02e09a83a8..74e61a4a4dd 100644
--- a/pkgs/development/compilers/llvm/5/libc++/default.nix
+++ b/pkgs/development/compilers/llvm/5/libc++/default.nix
@@ -45,7 +45,7 @@ stdenv.mkDerivation {
   ];
 
   meta = {
-    homepage = http://libcxx.llvm.org/;
+    homepage = https://libcxx.llvm.org/;
     description = "A new implementation of the C++ standard library, targeting C++11";
     license = with stdenv.lib.licenses; [ ncsa mit ];
     platforms = stdenv.lib.platforms.unix;
diff --git a/pkgs/development/compilers/llvm/5/libc++abi.nix b/pkgs/development/compilers/llvm/5/libc++abi.nix
index 1b891af09ed..9655b48088a 100644
--- a/pkgs/development/compilers/llvm/5/libc++abi.nix
+++ b/pkgs/development/compilers/llvm/5/libc++abi.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation {
         # this should be done in CMake, but having trouble figuring out
         # the magic combination of necessary CMake variables
         # if you fancy a try, take a look at
-        # http://www.cmake.org/Wiki/CMake_RPATH_handling
+        # https://gitlab.kitware.com/cmake/community/-/wikis/doc/cmake/RPATH-handling
         install_name_tool -id $out/$file $file
       done
       make install
@@ -42,7 +42,7 @@ stdenv.mkDerivation {
     '';
 
   meta = {
-    homepage = http://libcxxabi.llvm.org/;
+    homepage = https://libcxxabi.llvm.org/;
     description = "A new implementation of low level support for a standard C++ library";
     license = with stdenv.lib.licenses; [ ncsa mit ];
     maintainers = with stdenv.lib.maintainers; [ vlstill ];
diff --git a/pkgs/development/compilers/llvm/5/lld.nix b/pkgs/development/compilers/llvm/5/lld.nix
index bfee91d91bf..608211efb58 100644
--- a/pkgs/development/compilers/llvm/5/lld.nix
+++ b/pkgs/development/compilers/llvm/5/lld.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation {
 
   meta = {
     description = "The LLVM Linker";
-    homepage    = http://lld.llvm.org/;
+    homepage    = https://lld.llvm.org/;
     license     = stdenv.lib.licenses.ncsa;
     platforms   = stdenv.lib.platforms.all;
     badPlatforms = [ "x86_64-darwin" ];
diff --git a/pkgs/development/compilers/llvm/5/lldb.nix b/pkgs/development/compilers/llvm/5/lldb.nix
index a91a7e4354e..6bdd7f4be7d 100644
--- a/pkgs/development/compilers/llvm/5/lldb.nix
+++ b/pkgs/development/compilers/llvm/5/lldb.nix
@@ -50,7 +50,7 @@ stdenv.mkDerivation {
 
   meta = with stdenv.lib; {
     description = "A next-generation high-performance debugger";
-    homepage    = http://llvm.org/;
+    homepage    = https://llvm.org/;
     license     = licenses.ncsa;
     platforms   = platforms.all;
   };
diff --git a/pkgs/development/compilers/llvm/5/llvm.nix b/pkgs/development/compilers/llvm/5/llvm.nix
index 2ce17765d63..55eb61082e4 100644
--- a/pkgs/development/compilers/llvm/5/llvm.nix
+++ b/pkgs/development/compilers/llvm/5/llvm.nix
@@ -151,7 +151,7 @@ stdenv.mkDerivation ({
   requiredSystemFeatures = [ "big-parallel" ];
   meta = {
     description = "Collection of modular and reusable compiler and toolchain technologies";
-    homepage    = http://llvm.org/;
+    homepage    = https://llvm.org/;
     license     = stdenv.lib.licenses.ncsa;
     maintainers = with stdenv.lib.maintainers; [ lovek323 raskin dtzWill ];
     platforms   = stdenv.lib.platforms.all;
diff --git a/pkgs/development/compilers/llvm/5/openmp.nix b/pkgs/development/compilers/llvm/5/openmp.nix
index 559377bcc1b..03a98f13148 100644
--- a/pkgs/development/compilers/llvm/5/openmp.nix
+++ b/pkgs/development/compilers/llvm/5/openmp.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation {
 
   meta = {
     description = "Components required to build an executable OpenMP program";
-    homepage    = http://openmp.llvm.org/;
+    homepage    = https://openmp.llvm.org/;
     license     = stdenv.lib.licenses.mit;
     platforms   = stdenv.lib.platforms.all;
   };
diff --git a/pkgs/development/compilers/llvm/6/clang/default.nix b/pkgs/development/compilers/llvm/6/clang/default.nix
index 9374fc0bda9..113b36e3229 100644
--- a/pkgs/development/compilers/llvm/6/clang/default.nix
+++ b/pkgs/development/compilers/llvm/6/clang/default.nix
@@ -83,7 +83,7 @@ let
 
     meta = {
       description = "A c, c++, objective-c, and objective-c++ frontend for the llvm compiler";
-      homepage    = http://llvm.org/;
+      homepage    = https://llvm.org/;
       license     = stdenv.lib.licenses.ncsa;
       platforms   = stdenv.lib.platforms.all;
     };
diff --git a/pkgs/development/compilers/llvm/6/libc++/default.nix b/pkgs/development/compilers/llvm/6/libc++/default.nix
index 831c6c9c700..2dccac3938b 100644
--- a/pkgs/development/compilers/llvm/6/libc++/default.nix
+++ b/pkgs/development/compilers/llvm/6/libc++/default.nix
@@ -45,7 +45,7 @@ stdenv.mkDerivation {
   ];
 
   meta = {
-    homepage = http://libcxx.llvm.org/;
+    homepage = https://libcxx.llvm.org/;
     description = "A new implementation of the C++ standard library, targeting C++11";
     license = with stdenv.lib.licenses; [ ncsa mit ];
     platforms = stdenv.lib.platforms.unix;
diff --git a/pkgs/development/compilers/llvm/6/libc++abi.nix b/pkgs/development/compilers/llvm/6/libc++abi.nix
index ac1f4f653e6..7c6d8974bbd 100644
--- a/pkgs/development/compilers/llvm/6/libc++abi.nix
+++ b/pkgs/development/compilers/llvm/6/libc++abi.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation {
         # this should be done in CMake, but having trouble figuring out
         # the magic combination of necessary CMake variables
         # if you fancy a try, take a look at
-        # http://www.cmake.org/Wiki/CMake_RPATH_handling
+        # https://gitlab.kitware.com/cmake/community/-/wikis/doc/cmake/RPATH-handling
         install_name_tool -id $out/$file $file
       done
       make install
@@ -42,7 +42,7 @@ stdenv.mkDerivation {
     '';
 
   meta = {
-    homepage = http://libcxxabi.llvm.org/;
+    homepage = https://libcxxabi.llvm.org/;
     description = "A new implementation of low level support for a standard C++ library";
     license = with stdenv.lib.licenses; [ ncsa mit ];
     maintainers = with stdenv.lib.maintainers; [ vlstill ];
diff --git a/pkgs/development/compilers/llvm/6/lld.nix b/pkgs/development/compilers/llvm/6/lld.nix
index 58b9b8060fa..30e612cebec 100644
--- a/pkgs/development/compilers/llvm/6/lld.nix
+++ b/pkgs/development/compilers/llvm/6/lld.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation {
 
   meta = {
     description = "The LLVM Linker";
-    homepage    = http://lld.llvm.org/;
+    homepage    = https://lld.llvm.org/;
     license     = stdenv.lib.licenses.ncsa;
     platforms   = stdenv.lib.platforms.all;
   };
diff --git a/pkgs/development/compilers/llvm/6/lldb.nix b/pkgs/development/compilers/llvm/6/lldb.nix
index 30d72d94426..90b147fe088 100644
--- a/pkgs/development/compilers/llvm/6/lldb.nix
+++ b/pkgs/development/compilers/llvm/6/lldb.nix
@@ -50,7 +50,7 @@ stdenv.mkDerivation {
 
   meta = with stdenv.lib; {
     description = "A next-generation high-performance debugger";
-    homepage    = http://llvm.org/;
+    homepage    = https://llvm.org/;
     license     = licenses.ncsa;
     platforms   = platforms.all;
   };
diff --git a/pkgs/development/compilers/llvm/6/llvm.nix b/pkgs/development/compilers/llvm/6/llvm.nix
index 80acd3fa2fe..7bb3d38033d 100644
--- a/pkgs/development/compilers/llvm/6/llvm.nix
+++ b/pkgs/development/compilers/llvm/6/llvm.nix
@@ -149,7 +149,7 @@ stdenv.mkDerivation ({
 
   meta = {
     description = "Collection of modular and reusable compiler and toolchain technologies";
-    homepage    = http://llvm.org/;
+    homepage    = https://llvm.org/;
     license     = stdenv.lib.licenses.ncsa;
     maintainers = with stdenv.lib.maintainers; [ lovek323 raskin dtzWill ];
     platforms   = stdenv.lib.platforms.all;
diff --git a/pkgs/development/compilers/llvm/6/openmp.nix b/pkgs/development/compilers/llvm/6/openmp.nix
index 447904b9ad5..e1ed2d7438e 100644
--- a/pkgs/development/compilers/llvm/6/openmp.nix
+++ b/pkgs/development/compilers/llvm/6/openmp.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation {
 
   meta = {
     description = "Components required to build an executable OpenMP program";
-    homepage    = http://openmp.llvm.org/;
+    homepage    = https://openmp.llvm.org/;
     license     = stdenv.lib.licenses.mit;
     platforms   = stdenv.lib.platforms.all;
   };
diff --git a/pkgs/development/compilers/llvm/7/clang/default.nix b/pkgs/development/compilers/llvm/7/clang/default.nix
index 6e01f4259ee..52ddbeccdff 100644
--- a/pkgs/development/compilers/llvm/7/clang/default.nix
+++ b/pkgs/development/compilers/llvm/7/clang/default.nix
@@ -93,7 +93,7 @@ let
 
     meta = {
       description = "A c, c++, objective-c, and objective-c++ frontend for the llvm compiler";
-      homepage    = http://llvm.org/;
+      homepage    = https://llvm.org/;
       license     = stdenv.lib.licenses.ncsa;
       platforms   = stdenv.lib.platforms.all;
     };
diff --git a/pkgs/development/compilers/llvm/7/libc++/default.nix b/pkgs/development/compilers/llvm/7/libc++/default.nix
index f2cdd2f6f5f..9537e97af99 100644
--- a/pkgs/development/compilers/llvm/7/libc++/default.nix
+++ b/pkgs/development/compilers/llvm/7/libc++/default.nix
@@ -45,7 +45,7 @@ stdenv.mkDerivation {
   ];
 
   meta = {
-    homepage = http://libcxx.llvm.org/;
+    homepage = https://libcxx.llvm.org/;
     description = "A new implementation of the C++ standard library, targeting C++11";
     license = with stdenv.lib.licenses; [ ncsa mit ];
     platforms = stdenv.lib.platforms.unix;
diff --git a/pkgs/development/compilers/llvm/7/libc++abi.nix b/pkgs/development/compilers/llvm/7/libc++abi.nix
index 9067bf43a8f..99d7983691c 100644
--- a/pkgs/development/compilers/llvm/7/libc++abi.nix
+++ b/pkgs/development/compilers/llvm/7/libc++abi.nix
@@ -28,7 +28,7 @@ stdenv.mkDerivation {
         # this should be done in CMake, but having trouble figuring out
         # the magic combination of necessary CMake variables
         # if you fancy a try, take a look at
-        # http://www.cmake.org/Wiki/CMake_RPATH_handling
+        # https://gitlab.kitware.com/cmake/community/-/wikis/doc/cmake/RPATH-handling
         install_name_tool -id $out/$file $file
       done
       make install
@@ -45,7 +45,7 @@ stdenv.mkDerivation {
     '';
 
   meta = {
-    homepage = http://libcxxabi.llvm.org/;
+    homepage = https://libcxxabi.llvm.org/;
     description = "A new implementation of low level support for a standard C++ library";
     license = with stdenv.lib.licenses; [ ncsa mit ];
     maintainers = with stdenv.lib.maintainers; [ vlstill ];
diff --git a/pkgs/development/compilers/llvm/7/lld.nix b/pkgs/development/compilers/llvm/7/lld.nix
index 823e9640cf4..275b551863a 100644
--- a/pkgs/development/compilers/llvm/7/lld.nix
+++ b/pkgs/development/compilers/llvm/7/lld.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation {
 
   meta = {
     description = "The LLVM Linker";
-    homepage    = http://lld.llvm.org/;
+    homepage    = https://lld.llvm.org/;
     license     = stdenv.lib.licenses.ncsa;
     platforms   = stdenv.lib.platforms.all;
   };
diff --git a/pkgs/development/compilers/llvm/7/lldb.nix b/pkgs/development/compilers/llvm/7/lldb.nix
index ace6ae812fd..305f1ad3595 100644
--- a/pkgs/development/compilers/llvm/7/lldb.nix
+++ b/pkgs/development/compilers/llvm/7/lldb.nix
@@ -61,7 +61,7 @@ stdenv.mkDerivation {
 
   meta = with stdenv.lib; {
     description = "A next-generation high-performance debugger";
-    homepage    = http://llvm.org/;
+    homepage    = https://llvm.org/;
     license     = licenses.ncsa;
     platforms   = platforms.all;
   };
diff --git a/pkgs/development/compilers/llvm/7/llvm.nix b/pkgs/development/compilers/llvm/7/llvm.nix
index d7fb1fe4b93..4a019b5ad25 100644
--- a/pkgs/development/compilers/llvm/7/llvm.nix
+++ b/pkgs/development/compilers/llvm/7/llvm.nix
@@ -170,7 +170,7 @@ in stdenv.mkDerivation ({
 
   meta = {
     description = "Collection of modular and reusable compiler and toolchain technologies";
-    homepage    = http://llvm.org/;
+    homepage    = https://llvm.org/;
     license     = stdenv.lib.licenses.ncsa;
     maintainers = with stdenv.lib.maintainers; [ lovek323 raskin dtzWill ];
     platforms   = stdenv.lib.platforms.all;
diff --git a/pkgs/development/compilers/llvm/7/openmp.nix b/pkgs/development/compilers/llvm/7/openmp.nix
index 7adc2aa588e..772693e54c3 100644
--- a/pkgs/development/compilers/llvm/7/openmp.nix
+++ b/pkgs/development/compilers/llvm/7/openmp.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation {
 
   meta = {
     description = "Components required to build an executable OpenMP program";
-    homepage    = http://openmp.llvm.org/;
+    homepage    = https://openmp.llvm.org/;
     license     = stdenv.lib.licenses.mit;
     platforms   = stdenv.lib.platforms.all;
   };
diff --git a/pkgs/development/compilers/llvm/8/clang/default.nix b/pkgs/development/compilers/llvm/8/clang/default.nix
index 81a069e6c01..563986f1648 100644
--- a/pkgs/development/compilers/llvm/8/clang/default.nix
+++ b/pkgs/development/compilers/llvm/8/clang/default.nix
@@ -103,7 +103,7 @@ let
 
     meta = {
       description = "A c, c++, objective-c, and objective-c++ frontend for the llvm compiler";
-      homepage    = http://llvm.org/;
+      homepage    = https://llvm.org/;
       license     = stdenv.lib.licenses.ncsa;
       platforms   = stdenv.lib.platforms.all;
     };
diff --git a/pkgs/development/compilers/llvm/8/libc++/default.nix b/pkgs/development/compilers/llvm/8/libc++/default.nix
index 883d9c8776f..f29b60fa731 100644
--- a/pkgs/development/compilers/llvm/8/libc++/default.nix
+++ b/pkgs/development/compilers/llvm/8/libc++/default.nix
@@ -51,7 +51,7 @@ stdenv.mkDerivation {
   ];
 
   meta = {
-    homepage = http://libcxx.llvm.org/;
+    homepage = https://libcxx.llvm.org/;
     description = "A new implementation of the C++ standard library, targeting C++11";
     license = with stdenv.lib.licenses; [ ncsa mit ];
     platforms = stdenv.lib.platforms.all;
diff --git a/pkgs/development/compilers/llvm/8/libc++abi.nix b/pkgs/development/compilers/llvm/8/libc++abi.nix
index 58a1241d823..dc2f02c1d99 100644
--- a/pkgs/development/compilers/llvm/8/libc++abi.nix
+++ b/pkgs/development/compilers/llvm/8/libc++abi.nix
@@ -40,7 +40,7 @@ stdenv.mkDerivation {
         # this should be done in CMake, but having trouble figuring out
         # the magic combination of necessary CMake variables
         # if you fancy a try, take a look at
-        # http://www.cmake.org/Wiki/CMake_RPATH_handling
+        # https://gitlab.kitware.com/cmake/community/-/wikis/doc/cmake/RPATH-handling
         install_name_tool -id $out/$file $file
       done
       make install
@@ -58,7 +58,7 @@ stdenv.mkDerivation {
     '';
 
   meta = {
-    homepage = http://libcxxabi.llvm.org/;
+    homepage = https://libcxxabi.llvm.org/;
     description = "A new implementation of low level support for a standard C++ library";
     license = with stdenv.lib.licenses; [ ncsa mit ];
     maintainers = with stdenv.lib.maintainers; [ vlstill ];
diff --git a/pkgs/development/compilers/llvm/8/lld.nix b/pkgs/development/compilers/llvm/8/lld.nix
index fc52d691d03..fc7e4ca1c9d 100644
--- a/pkgs/development/compilers/llvm/8/lld.nix
+++ b/pkgs/development/compilers/llvm/8/lld.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation {
 
   meta = {
     description = "The LLVM Linker";
-    homepage    = http://lld.llvm.org/;
+    homepage    = https://lld.llvm.org/;
     license     = stdenv.lib.licenses.ncsa;
     platforms   = stdenv.lib.platforms.all;
   };
diff --git a/pkgs/development/compilers/llvm/8/lldb.nix b/pkgs/development/compilers/llvm/8/lldb.nix
index 75be5b993df..8893371e2aa 100644
--- a/pkgs/development/compilers/llvm/8/lldb.nix
+++ b/pkgs/development/compilers/llvm/8/lldb.nix
@@ -54,7 +54,7 @@ stdenv.mkDerivation {
 
   meta = with stdenv.lib; {
     description = "A next-generation high-performance debugger";
-    homepage    = http://llvm.org/;
+    homepage    = https://llvm.org/;
     license     = licenses.ncsa;
     platforms   = platforms.all;
   };
diff --git a/pkgs/development/compilers/llvm/8/llvm.nix b/pkgs/development/compilers/llvm/8/llvm.nix
index a9c4a6b0ba2..47535148f88 100644
--- a/pkgs/development/compilers/llvm/8/llvm.nix
+++ b/pkgs/development/compilers/llvm/8/llvm.nix
@@ -145,7 +145,7 @@ in stdenv.mkDerivation ({
 
   meta = {
     description = "Collection of modular and reusable compiler and toolchain technologies";
-    homepage    = http://llvm.org/;
+    homepage    = https://llvm.org/;
     license     = stdenv.lib.licenses.ncsa;
     maintainers = with stdenv.lib.maintainers; [ lovek323 raskin dtzWill ];
     platforms   = stdenv.lib.platforms.all;
diff --git a/pkgs/development/compilers/llvm/8/openmp.nix b/pkgs/development/compilers/llvm/8/openmp.nix
index 166e7f68eb3..df3c8ab1702 100644
--- a/pkgs/development/compilers/llvm/8/openmp.nix
+++ b/pkgs/development/compilers/llvm/8/openmp.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation {
 
   meta = {
     description = "Components required to build an executable OpenMP program";
-    homepage    = http://openmp.llvm.org/;
+    homepage    = https://openmp.llvm.org/;
     license     = stdenv.lib.licenses.mit;
     platforms   = stdenv.lib.platforms.all;
   };
diff --git a/pkgs/development/compilers/llvm/9/clang/default.nix b/pkgs/development/compilers/llvm/9/clang/default.nix
index d8df52df553..e0e448390b1 100644
--- a/pkgs/development/compilers/llvm/9/clang/default.nix
+++ b/pkgs/development/compilers/llvm/9/clang/default.nix
@@ -98,7 +98,7 @@ let
 
     meta = {
       description = "A c, c++, objective-c, and objective-c++ frontend for the llvm compiler";
-      homepage    = http://llvm.org/;
+      homepage    = https://llvm.org/;
       license     = stdenv.lib.licenses.ncsa;
       platforms   = stdenv.lib.platforms.all;
     };
diff --git a/pkgs/development/compilers/llvm/9/libc++/default.nix b/pkgs/development/compilers/llvm/9/libc++/default.nix
index 9e3525574d5..67672a45d40 100644
--- a/pkgs/development/compilers/llvm/9/libc++/default.nix
+++ b/pkgs/development/compilers/llvm/9/libc++/default.nix
@@ -47,7 +47,7 @@ stdenv.mkDerivation {
   ];
 
   meta = {
-    homepage = http://libcxx.llvm.org/;
+    homepage = https://libcxx.llvm.org/;
     description = "A new implementation of the C++ standard library, targeting C++11";
     license = with stdenv.lib.licenses; [ ncsa mit ];
     platforms = stdenv.lib.platforms.all;
diff --git a/pkgs/development/compilers/llvm/9/libc++abi.nix b/pkgs/development/compilers/llvm/9/libc++abi.nix
index fbc9a3731ef..4e3c7b6aeee 100644
--- a/pkgs/development/compilers/llvm/9/libc++abi.nix
+++ b/pkgs/development/compilers/llvm/9/libc++abi.nix
@@ -40,7 +40,7 @@ stdenv.mkDerivation {
         # this should be done in CMake, but having trouble figuring out
         # the magic combination of necessary CMake variables
         # if you fancy a try, take a look at
-        # http://www.cmake.org/Wiki/CMake_RPATH_handling
+        # https://gitlab.kitware.com/cmake/community/-/wikis/doc/cmake/RPATH-handling
         install_name_tool -id $out/$file $file
       done
       make install
@@ -58,7 +58,7 @@ stdenv.mkDerivation {
     '';
 
   meta = {
-    homepage = http://libcxxabi.llvm.org/;
+    homepage = https://libcxxabi.llvm.org/;
     description = "A new implementation of low level support for a standard C++ library";
     license = with stdenv.lib.licenses; [ ncsa mit ];
     maintainers = with stdenv.lib.maintainers; [ vlstill ];
diff --git a/pkgs/development/compilers/llvm/9/lld.nix b/pkgs/development/compilers/llvm/9/lld.nix
index 775dc2e1905..7378cf912a6 100644
--- a/pkgs/development/compilers/llvm/9/lld.nix
+++ b/pkgs/development/compilers/llvm/9/lld.nix
@@ -26,7 +26,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "The LLVM Linker";
-    homepage    = http://lld.llvm.org/;
+    homepage    = https://lld.llvm.org/;
     license     = stdenv.lib.licenses.ncsa;
     platforms   = stdenv.lib.platforms.all;
   };
diff --git a/pkgs/development/compilers/llvm/9/lldb.nix b/pkgs/development/compilers/llvm/9/lldb.nix
index 506fc1c3e50..b1e375b336b 100644
--- a/pkgs/development/compilers/llvm/9/lldb.nix
+++ b/pkgs/development/compilers/llvm/9/lldb.nix
@@ -65,7 +65,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "A next-generation high-performance debugger";
-    homepage = http://llvm.org/;
+    homepage = https://llvm.org/;
     license = licenses.ncsa;
     platforms = platforms.all;
   };
diff --git a/pkgs/development/compilers/llvm/9/llvm.nix b/pkgs/development/compilers/llvm/9/llvm.nix
index 2cdc5a5fd06..089d66ba750 100644
--- a/pkgs/development/compilers/llvm/9/llvm.nix
+++ b/pkgs/development/compilers/llvm/9/llvm.nix
@@ -162,7 +162,7 @@ in stdenv.mkDerivation (rec {
 
   meta = {
     description = "Collection of modular and reusable compiler and toolchain technologies";
-    homepage    = http://llvm.org/;
+    homepage    = https://llvm.org/;
     license     = stdenv.lib.licenses.ncsa;
     maintainers = with stdenv.lib.maintainers; [ lovek323 raskin dtzWill ];
     platforms   = stdenv.lib.platforms.all;
diff --git a/pkgs/development/compilers/llvm/9/openmp.nix b/pkgs/development/compilers/llvm/9/openmp.nix
index 4e0a5535ae3..9bf57451f32 100644
--- a/pkgs/development/compilers/llvm/9/openmp.nix
+++ b/pkgs/development/compilers/llvm/9/openmp.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Components required to build an executable OpenMP program";
-    homepage    = http://openmp.llvm.org/;
+    homepage    = https://openmp.llvm.org/;
     license     = stdenv.lib.licenses.mit;
     platforms   = stdenv.lib.platforms.all;
   };