diff --git a/pkgs/applications/science/misc/root/default.nix b/pkgs/applications/science/misc/root/default.nix
index 59bb9415b37d..afc048cc41ef 100644
--- a/pkgs/applications/science/misc/root/default.nix
+++ b/pkgs/applications/science/misc/root/default.nix
@@ -1,6 +1,7 @@
 { stdenv
 , lib
 , callPackage
+, fetchgit
 , fetchurl
 , fetchpatch
 , makeWrapper
@@ -68,6 +69,12 @@ stdenv.mkDerivation rec {
     hash = "sha256-MA237RtnjtL7ljXKZ1khoZRcfCED2oQAM7STCR9VcAw=";
   };
 
+  clad_src = fetchgit {
+    url = "https://github.com/vgvassilev/clad";
+    rev = "refs/tags/v1.4"; # Make sure that this is the same tag as in the ROOT build files!
+    hash = "sha256-OI9PaS7kQ/ewD5Soe3gG5FZdlR6qG6Y3mfHwi5dj1sI=";
+  };
+
   nativeBuildInputs = [ makeWrapper cmake pkg-config git ];
   propagatedBuildInputs = [
     nlohmann_json
@@ -131,6 +138,23 @@ stdenv.mkDerivation rec {
     substituteInPlace cmake/modules/SearchInstalledSoftware.cmake \
       --replace 'set(lcgpackages ' '#set(lcgpackages '
 
+    # We have to bypass the connection check, because it would disable clad.
+    # This should probably be fixed upstream with a flag to disable the
+    # connectivity check!
+    substituteInPlace CMakeLists.txt \
+      --replace 'if(NO_CONNECTION)' 'if(FALSE)'
+    substituteInPlace interpreter/cling/tools/plugins/CMakeLists.txt \
+      --replace 'if(NOT DEFINED NO_CONNECTION OR NOT NO_CONNECTION)' 'if(TRUE)'
+    # Make sure that clad is not downloaded when building
+    substituteInPlace interpreter/cling/tools/plugins/clad/CMakeLists.txt \
+      --replace 'UPDATE_COMMAND ""' 'SOURCE_DIR ${clad_src} DOWNLOAD_COMMAND "" UPDATE_COMMAND ""'
+    # Make sure that clad is finding the right llvm version
+    substituteInPlace interpreter/cling/tools/plugins/clad/CMakeLists.txt \
+      --replace '-DLLVM_DIR=''${LLVM_BINARY_DIR}' '-DLLVM_DIR=${llvm_13.dev}/lib/cmake/llvm'
+    # Fix that will also be upstream in ROOT 6.32. TODO: remove it when updating to 6.32
+    substituteInPlace interpreter/cling/tools/plugins/clad/CMakeLists.txt \
+      --replace 'set(_CLAD_LIBRARY_PATH ''${clad_install_dir}/plugins/lib)' 'set(_CLAD_LIBRARY_PATH ''${CMAKE_CURRENT_BINARY_DIR}/clad-prefix/src/clad-build/lib''${LLVM_LIBDIR_SUFFIX})'
+
     substituteInPlace interpreter/llvm-project/clang/tools/driver/CMakeLists.txt \
       --replace 'add_clang_symlink(''${link} clang)' ""
 
@@ -151,40 +175,18 @@ stdenv.mkDerivation rec {
   '';
 
   cmakeFlags = [
-    "-Drpath=ON"
     "-DCMAKE_INSTALL_BINDIR=bin"
     "-DCMAKE_INSTALL_LIBDIR=lib"
     "-DCMAKE_INSTALL_INCLUDEDIR=include"
     "-Dbuiltin_llvm=OFF"
-    "-Dbuiltin_freetype=OFF"
-    "-Dbuiltin_gtest=OFF"
-    "-Dbuiltin_nlohmannjson=OFF"
-    "-Dbuiltin_openui5=ON"
-    "-Dclad=OFF"
-    "-Ddavix=ON"
-    "-Ddcache=OFF"
     "-Dfail-on-missing=ON"
-    "-Dfftw3=OFF"
     "-Dfitsio=OFF"
-    "-Dfortran=OFF"
     "-Dgnuinstall=ON"
-    "-Dimt=ON"
-    "-Dgviz=OFF"
-    "-Dhttp=ON"
     "-Dmysql=OFF"
-    "-Dodbc=OFF"
-    "-Dopengl=ON"
     "-Dpgsql=OFF"
-    "-Dpythia8=OFF"
-    "-Droot7=ON"
     "-Dsqlite=OFF"
-    "-Dssl=ON"
-    "-Dtmva=ON"
     "-Dtmva-pymva=OFF"
     "-Dvdt=OFF"
-    "-Dwebgui=ON"
-    "-Dxml=ON"
-    "-Dxrootd=ON"
   ]
   ++ lib.optional (stdenv.cc.libc != null) "-DC_INCLUDE_DIRS=${lib.getDev stdenv.cc.libc}/include"
   ++ lib.optionals stdenv.isDarwin [
@@ -195,6 +197,9 @@ stdenv.mkDerivation rec {
     "-Druntime_cxxmodules=OFF"
   ];
 
+  # suppress warnings from compilation of the vendored clang to avoid running into log limits on the Hydra
+  NIX_CFLAGS_COMPILE = lib.optionals stdenv.cc.isGNU [ "-Wno-shadow" "-Wno-maybe-uninitialized" ];
+
   postInstall = ''
     for prog in rootbrowse rootcp rooteventselector rootls rootmkdir rootmv rootprint rootrm rootslimtree; do
       wrapProgram "$out/bin/$prog" \
@@ -251,7 +256,7 @@ stdenv.mkDerivation rec {
   setupHook = ./setup-hook.sh;
 
   meta = with lib; {
-    homepage = "https://root.cern.ch/";
+    homepage = "https://root.cern/";
     description = "A data analysis framework";
     platforms = platforms.unix;
     maintainers = [ maintainers.guitargeek maintainers.veprbl ];
diff --git a/pkgs/applications/science/misc/root/setup-hook.sh b/pkgs/applications/science/misc/root/setup-hook.sh
index 34c9bfdcebbd..7affd21012eb 100644
--- a/pkgs/applications/science/misc/root/setup-hook.sh
+++ b/pkgs/applications/science/misc/root/setup-hook.sh
@@ -12,8 +12,8 @@ thisroot () {
 
 postHooks+=(thisroot)
 
-addRootInludePath() {
+addRootIncludePath() {
     addToSearchPath ROOT_INCLUDE_PATH $1/include
 }
 
-addEnvHooks "$targetOffset" addRootInludePath
+addEnvHooks "$targetOffset" addRootIncludePath
diff --git a/pkgs/applications/science/misc/root/sw_vers.patch b/pkgs/applications/science/misc/root/sw_vers.patch
index 54ad1091392e..2a0fcd757719 100644
--- a/pkgs/applications/science/misc/root/sw_vers.patch
+++ b/pkgs/applications/science/misc/root/sw_vers.patch
@@ -48,7 +48,7 @@ diff a/cmake/modules/SetUpMacOS.cmake b/cmake/modules/SetUpMacOS.cmake
    #---Set Linker flags----------------------------------------------------------------------
 -  set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -mmacosx-version-min=${MACOSX_VERSION}")
  else (CMAKE_SYSTEM_NAME MATCHES Darwin)
-   MESSAGE(FATAL_ERROR "There is no setup for this this Apple system up to now. Don't know waht to do. Stop cmake at this point.")
+   MESSAGE(FATAL_ERROR "There is no setup for this this Apple system up to now. Don't know what to do. Stop cmake at this point.")
  endif (CMAKE_SYSTEM_NAME MATCHES Darwin)
 diff a/config/root-config.in b/config/root-config.in
 --- a/config/root-config.in