systemtap: remove hack, fix build

pkgs/development/tools/profiling/systemtap/default.nix

@@ -22,22 +22,10 @@ let
     env.NIX_CFLAGS_COMPILE = toString [ "-Wno-error=deprecated-declarations" ]; # Needed with GCC 12
   };
 
-  ## a kernel build dir as expected by systemtap
-  kernelBuildDir = runCommand "kbuild-${kernel.version}-merged" { } ''
-    mkdir -p $out
-    for f in \
-        ${kernel}/System.map \
-        ${kernel.dev}/vmlinux \
-        ${kernel.dev}/lib/modules/${kernel.modDirVersion}/build/{*,.*}
-    do
-      ln -s $(readlink -f $f) $out
-    done
-  '';
-
   pypkgs = with python3.pkgs; makePythonPath [ pyparsing ];
 
 in runCommand "systemtap-${kernel.version}-${version}" {
-  inherit stapBuild kernelBuildDir;
+  inherit stapBuild;
   nativeBuildInputs = [ makeWrapper ];
   meta = {
     homepage = "https://sourceware.org/systemtap/";
@@ -52,7 +40,7 @@ in runCommand "systemtap-${kernel.version}-${version}" {
   done
   rm $out/bin/stap $out/bin/dtrace
   makeWrapper $stapBuild/bin/stap $out/bin/stap \
-    --add-flags "-r $kernelBuildDir" \
+    --add-flags "-r ${kernel.dev}" \
     --prefix PATH : ${lib.makeBinPath [ stdenv.cc.cc stdenv.cc.bintools elfutils gnumake ]}
   makeWrapper $stapBuild/bin/dtrace $out/bin/dtrace \
     --prefix PYTHONPATH : ${pypkgs}