diff --git a/overlay.nix b/overlay.nix
index d4ea269..fd32645 100644
--- a/overlay.nix
+++ b/overlay.nix
@@ -40,10 +40,10 @@ let
     #pscom = callPackage ./pkgs/parastation/pscom.nix { }; # Unmaintaned
     #psmpi = callPackage ./pkgs/parastation/psmpi.nix { }; # Unmaintaned
     sonar = callPackage ./pkgs/sonar/default.nix { };
-    stdenvClangOmpss2 = final.stdenv.override { cc = final.clangOmpss2; allowedRequisites = null; };
-    stdenvClangOmpss2Nanos6 = final.stdenv.override { cc = final.clangOmpss2Nanos6; allowedRequisites = null; };
-    stdenvClangOmpss2Nodes = final.stdenv.override { cc = final.clangOmpss2Nodes; allowedRequisites = null; };
-    stdenvClangOmpss2NodesOmpv = final.stdenv.override { cc = final.clangOmpss2NodesOmpv; allowedRequisites = null; };
+    stdenvClangOmpss2 = final.stdenv.override { cc = final.buildPackages.clangOmpss2; allowedRequisites = null; };
+    stdenvClangOmpss2Nanos6 = final.stdenv.override { cc = final.buildPackages.clangOmpss2Nanos6; allowedRequisites = null; };
+    stdenvClangOmpss2Nodes = final.stdenv.override { cc = final.buildPackages.clangOmpss2Nodes; allowedRequisites = null; };
+    stdenvClangOmpss2NodesOmpv = final.stdenv.override { cc = final.buildPackages.clangOmpss2NodesOmpv; allowedRequisites = null; };
     tagaspi = callPackage ./pkgs/tagaspi/default.nix { };
     tampi = callPackage ./pkgs/tampi/default.nix { };
     wxparaver = callPackage ./pkgs/paraver/default.nix { };
diff --git a/pkgs/llvm-ompss2/clang.nix b/pkgs/llvm-ompss2/clang.nix
index 3302e64..0e655fe 100644
--- a/pkgs/llvm-ompss2/clang.nix
+++ b/pkgs/llvm-ompss2/clang.nix
@@ -1,5 +1,6 @@
 {
-  llvmPackages_latest
+  stdenv
+, llvmPackages_latest
 , lib
 , fetchFromGitHub
 , cmake
@@ -11,7 +12,6 @@
 , libffi
 , zlib
 , pkg-config
-, gcc # needed to set the rpath of libstdc++ for clang-tblgen
 , enableDebug ? false
 , useGit ? false
 , gitUrl ? "ssh://git@bscpm04.bsc.es/llvm-ompss/llvm-mono.git"
@@ -20,7 +20,10 @@
 }:
 
 let
-  stdenv = llvmPackages_latest.stdenv;
+  llvmPackages = llvmPackages_latest;
+  llvmStdenv = llvmPackages.stdenv;
+  # needed to set the rpath of libstdc++ for clang-tblgen
+  gcc = stdenv.cc;
 
   release = rec {
     version = "2024.11";
@@ -43,7 +46,7 @@ let
 
   source = if (useGit) then git else release;
 
-in stdenv.mkDerivation rec {
+in llvmStdenv.mkDerivation rec {
   pname = "clang-ompss2";
   inherit (source) src version;
 
@@ -57,20 +60,22 @@ in stdenv.mkDerivation rec {
 
   isClangWithOmpss = true;
 
-  nativeBuildInputs = [ zlib ];
+  nativeBuildInputs = [
+    zlib
+    gcc.cc.lib # Required for libstdc++.so.6
+    cmake
+    python3
+  ];
 
   buildInputs = [
     which
     bash
-    python3
     perl
-    cmake
-    llvmPackages_latest.lld
+    llvmPackages.lld
     elfutils
     libffi
     pkg-config
     zlib
-    gcc.cc.lib # Required for libstdc++.so.6
   ];
 
   # Error with -D_FORTIFY_SOURCE=2, see https://bugs.gentoo.org/636604:
@@ -86,6 +91,7 @@ in stdenv.mkDerivation rec {
 
   dontUseCmakeBuildDir = true;
 
+
   # Fix the host triple, as it has changed in a newer config.guess:
   # https://git.savannah.gnu.org/gitweb/?p=config.git;a=commitdiff;h=ca9bfb8cc75a2be1819d89c664a867785c96c9ba
   preConfigure = ''
@@ -93,8 +99,13 @@ in stdenv.mkDerivation rec {
     cd build
     cmakeDir="../llvm"
     cmakeFlagsArray=(
-      "-DLLVM_HOST_TRIPLE=${stdenv.targetPlatform.config}"
+      "-DLLVM_HOST_TRIPLE=${llvmStdenv.targetPlatform.config}"
+    '' + (if "${llvmStdenv.targetPlatform.config}" == "riscv64-unknown-linux-gnu" then ''
+      "-DLLVM_DEFAULT_TARGET_TRIPLE=riscv64-unknown-linux-gnu"
+      "-DLLVM_TARGETS_TO_BUILD=RISCV"
+    '' else ''
       "-DLLVM_TARGETS_TO_BUILD=host"
+    '') + ''
       "-DLLVM_BUILD_LLVM_DYLIB=ON"
       "-DLLVM_LINK_LLVM_DYLIB=ON"
       # Required to run clang-ast-dump and clang-tblgen during build
@@ -103,7 +114,8 @@ in stdenv.mkDerivation rec {
       "-DCMAKE_CXX_FLAGS_DEBUG=-g -ggnu-pubnames"
       "-DCMAKE_EXE_LINKER_FLAGS_DEBUG=-Wl,--gdb-index"
       "-DLLVM_LIT_ARGS=-sv --xunit-xml-output=xunit.xml"
-      "-DLLVM_ENABLE_PROJECTS=clang;compiler-rt;lld"
+      "-DLLVM_ENABLE_PROJECTS=clang;lld"
+      #"-DLLVM_ENABLE_PROJECTS=clang;compiler-rt;lld"
       "-DLLVM_ENABLE_ASSERTIONS=ON"
       "-DLLVM_INSTALL_TOOLCHAIN_ONLY=ON"
       "-DCMAKE_INSTALL_BINDIR=bin"