diff --git a/pkgs/development/compilers/llvm/13/clang/gnu-install-dirs.patch b/pkgs/development/compilers/llvm/13/clang/gnu-install-dirs.patch
deleted file mode 100644
index b834d386b4eb..000000000000
--- a/pkgs/development/compilers/llvm/13/clang/gnu-install-dirs.patch
+++ /dev/null
@@ -1,235 +0,0 @@
-diff --git a/CMakeLists.txt b/CMakeLists.txt
-index 9e74014134a0..976e6a1757fd 100644
---- a/CMakeLists.txt
-+++ b/CMakeLists.txt
-@@ -5,6 +5,8 @@ cmake_minimum_required(VERSION 3.13.4)
- if( CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR )
-   project(Clang)
- 
-+  include(GNUInstallDirs)
-+
-   set(CMAKE_CXX_STANDARD 14 CACHE STRING "C++ standard to conform to")
-   set(CMAKE_CXX_STANDARD_REQUIRED YES)
-   set(CMAKE_CXX_EXTENSIONS NO)
-@@ -416,7 +418,7 @@ include_directories(BEFORE
- 
- if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
-   install(DIRECTORY include/clang include/clang-c
--    DESTINATION include
-+    DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
-     COMPONENT clang-headers
-     FILES_MATCHING
-     PATTERN "*.def"
-@@ -425,7 +427,7 @@ if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
-     )
- 
-   install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/include/clang
--    DESTINATION include
-+    DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
-     COMPONENT clang-headers
-     FILES_MATCHING
-     PATTERN "CMakeFiles" EXCLUDE
-@@ -445,7 +447,7 @@ if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
- 
-   add_custom_target(bash-autocomplete DEPENDS utils/bash-autocomplete.sh)
-   install(PROGRAMS utils/bash-autocomplete.sh
--          DESTINATION share/clang
-+          DESTINATION ${CMAKE_INSTALL_DATADIR}/clang
-           COMPONENT bash-autocomplete)
-   if(NOT LLVM_ENABLE_IDE)
-     add_llvm_install_targets(install-bash-autocomplete
-diff --git a/cmake/modules/AddClang.cmake b/cmake/modules/AddClang.cmake
-index 704278a0e93b..d25c8d325c71 100644
---- a/cmake/modules/AddClang.cmake
-+++ b/cmake/modules/AddClang.cmake
-@@ -123,9 +123,9 @@ macro(add_clang_library name)
-         install(TARGETS ${lib}
-           COMPONENT ${lib}
-           ${export_to_clangtargets}
--          LIBRARY DESTINATION lib${LLVM_LIBDIR_SUFFIX}
--          ARCHIVE DESTINATION lib${LLVM_LIBDIR_SUFFIX}
--          RUNTIME DESTINATION bin)
-+          LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}${LLVM_LIBDIR_SUFFIX}
-+          ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}${LLVM_LIBDIR_SUFFIX}
-+          RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
- 
-         if (NOT LLVM_ENABLE_IDE)
-           add_llvm_install_targets(install-${lib}
-@@ -170,7 +170,7 @@ macro(add_clang_tool name)
- 
-     install(TARGETS ${name}
-       ${export_to_clangtargets}
--      RUNTIME DESTINATION bin
-+      RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
-       COMPONENT ${name})
- 
-     if(NOT LLVM_ENABLE_IDE)
-@@ -185,7 +185,7 @@ endmacro()
- macro(add_clang_symlink name dest)
-   add_llvm_tool_symlink(${name} ${dest} ALWAYS_GENERATE)
-   # Always generate install targets
--  llvm_install_symlink(${name} ${dest} ALWAYS_GENERATE)
-+  llvm_install_symlink(${name} ${dest} ${CMAKE_INSTALL_FULL_BINDIR} ALWAYS_GENERATE)
- endmacro()
- 
- function(clang_target_link_libraries target type)
-diff --git a/lib/Headers/CMakeLists.txt b/lib/Headers/CMakeLists.txt
-index b2c0ce8dd4a0..19e5443d8c25 100644
---- a/lib/Headers/CMakeLists.txt
-+++ b/lib/Headers/CMakeLists.txt
-@@ -215,7 +215,7 @@ set_target_properties(clang-resource-headers PROPERTIES
-   FOLDER "Misc"
-   RUNTIME_OUTPUT_DIRECTORY "${output_dir}")
- 
--set(header_install_dir lib${LLVM_LIBDIR_SUFFIX}/clang/${CLANG_VERSION}/include)
-+set(header_install_dir ${CMAKE_INSTALL_LIBDIR}${LLVM_LIBDIR_SUFFIX}/clang/${CLANG_VERSION}/include)
- 
- install(
-   FILES ${files} ${generated_files}
-diff --git a/tools/c-index-test/CMakeLists.txt b/tools/c-index-test/CMakeLists.txt
-index ceef4b08637c..8efad5520ca4 100644
---- a/tools/c-index-test/CMakeLists.txt
-+++ b/tools/c-index-test/CMakeLists.txt
-@@ -54,7 +54,7 @@ if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
-     set_property(TARGET c-index-test APPEND PROPERTY INSTALL_RPATH
-        "@executable_path/../../lib")
-   else()
--    set(INSTALL_DESTINATION bin)
-+    set(INSTALL_DESTINATION ${CMAKE_INSTALL_BINDIR})
-   endif()
- 
-   install(TARGETS c-index-test
-diff --git a/tools/clang-format/CMakeLists.txt b/tools/clang-format/CMakeLists.txt
-index 35ecdb11253c..d77d75de0094 100644
---- a/tools/clang-format/CMakeLists.txt
-+++ b/tools/clang-format/CMakeLists.txt
-@@ -21,20 +21,20 @@ if( LLVM_LIB_FUZZING_ENGINE OR LLVM_USE_SANITIZE_COVERAGE )
- endif()
- 
- install(PROGRAMS clang-format-bbedit.applescript
--  DESTINATION share/clang
-+  DESTINATION ${CMAKE_INSTALL_DATADIR}/clang
-   COMPONENT clang-format)
- install(PROGRAMS clang-format-diff.py
--  DESTINATION share/clang
-+  DESTINATION ${CMAKE_INSTALL_DATADIR}/clang
-   COMPONENT clang-format)
- install(PROGRAMS clang-format-sublime.py
--  DESTINATION share/clang
-+  DESTINATION ${CMAKE_INSTALL_DATADIR}/clang
-   COMPONENT clang-format)
- install(PROGRAMS clang-format.el
--  DESTINATION share/clang
-+  DESTINATION ${CMAKE_INSTALL_DATADIR}/clang
-   COMPONENT clang-format)
- install(PROGRAMS clang-format.py
--  DESTINATION share/clang
-+  DESTINATION ${CMAKE_INSTALL_DATADIR}/clang
-   COMPONENT clang-format)
- install(PROGRAMS git-clang-format
--  DESTINATION bin
-+  DESTINATION ${CMAKE_INSTALL_BINDIR}
-   COMPONENT clang-format)
-diff --git a/tools/clang-rename/CMakeLists.txt b/tools/clang-rename/CMakeLists.txt
-index cda8e29ec5b1..0134d8ccd70b 100644
---- a/tools/clang-rename/CMakeLists.txt
-+++ b/tools/clang-rename/CMakeLists.txt
-@@ -19,8 +19,8 @@ clang_target_link_libraries(clang-rename
-   )
- 
- install(PROGRAMS clang-rename.py
--  DESTINATION share/clang
-+  DESTINATION ${CMAKE_INSTALL_DATADIR}/clang
-   COMPONENT clang-rename)
- install(PROGRAMS clang-rename.el
--  DESTINATION share/clang
-+  DESTINATION ${CMAKE_INSTALL_DATADIR}/clang
-   COMPONENT clang-rename)
-diff --git a/tools/libclang/CMakeLists.txt b/tools/libclang/CMakeLists.txt
-index 51ff2e7e1565..1ed5f8a079a1 100644
---- a/tools/libclang/CMakeLists.txt
-+++ b/tools/libclang/CMakeLists.txt
-@@ -166,7 +166,7 @@ endif()
- if(INTERNAL_INSTALL_PREFIX)
-   set(LIBCLANG_HEADERS_INSTALL_DESTINATION "${INTERNAL_INSTALL_PREFIX}/include")
- else()
--  set(LIBCLANG_HEADERS_INSTALL_DESTINATION include)
-+  set(LIBCLANG_HEADERS_INSTALL_DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
- endif()
- 
- install(DIRECTORY ../../include/clang-c
-@@ -196,7 +196,7 @@ foreach(PythonVersion ${CLANG_PYTHON_BINDINGS_VERSIONS})
-           COMPONENT
-             libclang-python-bindings
-           DESTINATION
--            "lib${LLVM_LIBDIR_SUFFIX}/python${PythonVersion}/site-packages")
-+            "${CMAKE_INSTALL_LIBDIR}${LLVM_LIBDIR_SUFFIX}/python${PythonVersion}/site-packages")
- endforeach()
- if(NOT LLVM_ENABLE_IDE)
-   add_custom_target(libclang-python-bindings)
-diff --git a/tools/scan-build/CMakeLists.txt b/tools/scan-build/CMakeLists.txt
-index ec0702d76f18..d25d982f51da 100644
---- a/tools/scan-build/CMakeLists.txt
-+++ b/tools/scan-build/CMakeLists.txt
-@@ -47,7 +47,7 @@ if(CLANG_INSTALL_SCANBUILD)
-                        DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/bin/${BinFile})
-     list(APPEND Depends ${CMAKE_BINARY_DIR}/bin/${BinFile})
-     install(PROGRAMS bin/${BinFile}
--            DESTINATION bin
-+            DESTINATION ${CMAKE_INSTALL_BINDIR}
-             COMPONENT scan-build)
-   endforeach()
- 
-@@ -61,7 +61,7 @@ if(CLANG_INSTALL_SCANBUILD)
-                        DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/libexec/${LibexecFile})
-     list(APPEND Depends ${CMAKE_BINARY_DIR}/libexec/${LibexecFile})
-     install(PROGRAMS libexec/${LibexecFile}
--            DESTINATION libexec
-+            DESTINATION ${CMAKE_INSTALL_LIBEXECDIR}
-             COMPONENT scan-build)
-   endforeach()
- 
-@@ -89,7 +89,7 @@ if(CLANG_INSTALL_SCANBUILD)
-                        DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/share/scan-build/${ShareFile})
-     list(APPEND Depends ${CMAKE_BINARY_DIR}/share/scan-build/${ShareFile})
-     install(FILES share/scan-build/${ShareFile}
--            DESTINATION share/scan-build
-+            DESTINATION ${CMAKE_INSTALL_DATADIR}/scan-build
-             COMPONENT scan-build)
-   endforeach()
- 
-diff --git a/tools/scan-view/CMakeLists.txt b/tools/scan-view/CMakeLists.txt
-index dd3d33439299..fea19c12ce70 100644
---- a/tools/scan-view/CMakeLists.txt
-+++ b/tools/scan-view/CMakeLists.txt
-@@ -19,7 +19,7 @@ if(CLANG_INSTALL_SCANVIEW)
-                        DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/bin/${BinFile})
-     list(APPEND Depends ${CMAKE_BINARY_DIR}/bin/${BinFile})
-     install(PROGRAMS bin/${BinFile}
--            DESTINATION bin
-+            DESTINATION ${CMAKE_INSTALL_BINDIR}
-             COMPONENT scan-view)
-   endforeach()
- 
-@@ -33,7 +33,7 @@ if(CLANG_INSTALL_SCANVIEW)
-                        DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/share/${ShareFile})
-     list(APPEND Depends ${CMAKE_BINARY_DIR}/share/scan-view/${ShareFile})
-     install(FILES share/${ShareFile}
--            DESTINATION share/scan-view
-+            DESTINATION ${CMAKE_INSTALL_DATADIR}/scan-view
-             COMPONENT scan-view)
-   endforeach()
- 
-diff --git a/utils/hmaptool/CMakeLists.txt b/utils/hmaptool/CMakeLists.txt
-index 62f2de0cb15c..6aa66825b6ec 100644
---- a/utils/hmaptool/CMakeLists.txt
-+++ b/utils/hmaptool/CMakeLists.txt
-@@ -10,7 +10,7 @@ add_custom_command(OUTPUT ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/bin/${CLANG_HM
- 
- list(APPEND Depends ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/bin/${CLANG_HMAPTOOL})
- install(PROGRAMS ${CLANG_HMAPTOOL}
--        DESTINATION bin
-+        DESTINATION ${CMAKE_INSTALL_BINDIR}
-         COMPONENT hmaptool)
- 
- add_custom_target(hmaptool ALL DEPENDS ${Depends})
diff --git a/pkgs/development/compilers/llvm/13/clang/purity.patch b/pkgs/development/compilers/llvm/13/clang/purity.patch
deleted file mode 100644
index deb230a36c5b..000000000000
--- a/pkgs/development/compilers/llvm/13/clang/purity.patch
+++ /dev/null
@@ -1,28 +0,0 @@
-From 4add81bba40dcec62c4ea4481be8e35ac53e89d8 Mon Sep 17 00:00:00 2001
-From: Will Dietz <w@wdtz.org>
-Date: Thu, 18 May 2017 11:56:12 -0500
-Subject: [PATCH] "purity" patch for 5.0
-
----
- lib/Driver/ToolChains/Gnu.cpp | 7 -------
- 1 file changed, 7 deletions(-)
-
-diff --git a/lib/Driver/ToolChains/Gnu.cpp b/lib/Driver/ToolChains/Gnu.cpp
-index fe3c0191bb..c6a482bece 100644
---- a/lib/Driver/ToolChains/Gnu.cpp
-+++ b/lib/Driver/ToolChains/Gnu.cpp
-@@ -487,12 +487,6 @@ void tools::gnutools::Linker::ConstructJob(Compilation &C, const JobAction &JA,
-   if (!IsStatic) {
-     if (Args.hasArg(options::OPT_rdynamic))
-       CmdArgs.push_back("-export-dynamic");
--
--    if (!Args.hasArg(options::OPT_shared) && !IsStaticPIE) {
--      CmdArgs.push_back("-dynamic-linker");
--      CmdArgs.push_back(Args.MakeArgString(Twine(D.DyldPrefix) +
--                                           ToolChain.getDynamicLinker(Args)));
--    }
-   }
- 
-   CmdArgs.push_back("-o");
--- 
-2.11.0
diff --git a/pkgs/development/compilers/llvm/14/clang/purity.patch b/pkgs/development/compilers/llvm/14/clang/purity.patch
deleted file mode 100644
index deb230a36c5b..000000000000
--- a/pkgs/development/compilers/llvm/14/clang/purity.patch
+++ /dev/null
@@ -1,28 +0,0 @@
-From 4add81bba40dcec62c4ea4481be8e35ac53e89d8 Mon Sep 17 00:00:00 2001
-From: Will Dietz <w@wdtz.org>
-Date: Thu, 18 May 2017 11:56:12 -0500
-Subject: [PATCH] "purity" patch for 5.0
-
----
- lib/Driver/ToolChains/Gnu.cpp | 7 -------
- 1 file changed, 7 deletions(-)
-
-diff --git a/lib/Driver/ToolChains/Gnu.cpp b/lib/Driver/ToolChains/Gnu.cpp
-index fe3c0191bb..c6a482bece 100644
---- a/lib/Driver/ToolChains/Gnu.cpp
-+++ b/lib/Driver/ToolChains/Gnu.cpp
-@@ -487,12 +487,6 @@ void tools::gnutools::Linker::ConstructJob(Compilation &C, const JobAction &JA,
-   if (!IsStatic) {
-     if (Args.hasArg(options::OPT_rdynamic))
-       CmdArgs.push_back("-export-dynamic");
--
--    if (!Args.hasArg(options::OPT_shared) && !IsStaticPIE) {
--      CmdArgs.push_back("-dynamic-linker");
--      CmdArgs.push_back(Args.MakeArgString(Twine(D.DyldPrefix) +
--                                           ToolChain.getDynamicLinker(Args)));
--    }
-   }
- 
-   CmdArgs.push_back("-o");
--- 
-2.11.0
diff --git a/pkgs/development/compilers/llvm/16/clang/purity.patch b/pkgs/development/compilers/llvm/16/clang/purity.patch
deleted file mode 100644
index 1c94f293eb93..000000000000
--- a/pkgs/development/compilers/llvm/16/clang/purity.patch
+++ /dev/null
@@ -1,29 +0,0 @@
-From 4add81bba40dcec62c4ea4481be8e35ac53e89d8 Mon Sep 17 00:00:00 2001
-From: Will Dietz <w@wdtz.org>
-Date: Thu, 18 May 2017 11:56:12 -0500
-Subject: [PATCH] "purity" patch for 5.0
-
----
- lib/Driver/ToolChains/Gnu.cpp | 7 -------
- 1 file changed, 7 deletions(-)
-
-diff --git a/lib/Driver/ToolChains/Gnu.cpp b/lib/Driver/ToolChains/Gnu.cpp
-index fe3c0191bb..c6a482bece 100644
---- a/lib/Driver/ToolChains/Gnu.cpp
-+++ b/lib/Driver/ToolChains/Gnu.cpp
-@@ -487,13 +487,7 @@ void tools::gnutools::Linker::ConstructJob(Compilation &C, const JobAction &JA,
-   } else {
-     if (Args.hasArg(options::OPT_rdynamic))
-       CmdArgs.push_back("-export-dynamic");
-
--    if (!Args.hasArg(options::OPT_shared) && !IsStaticPIE &&
--        !Args.hasArg(options::OPT_r)) {
--      CmdArgs.push_back("-dynamic-linker");
--      CmdArgs.push_back(Args.MakeArgString(Twine(D.DyldPrefix) +
--                                           ToolChain.getDynamicLinker(Args)));
--    }
-   }
- 
-   CmdArgs.push_back("-o");
--- 
-2.11.0
diff --git a/pkgs/development/compilers/llvm/19/clang/purity.patch b/pkgs/development/compilers/llvm/19/clang/purity.patch
deleted file mode 100644
index 5ce14a3479a0..000000000000
--- a/pkgs/development/compilers/llvm/19/clang/purity.patch
+++ /dev/null
@@ -1,25 +0,0 @@
-From 4add81bba40dcec62c4ea4481be8e35ac53e89d8 Mon Sep 17 00:00:00 2001
-From: Will Dietz <w@wdtz.org>
-Date: Thu, 18 May 2017 11:56:12 -0500
-Subject: [PATCH] "purity" patch for 5.0
-
----
- lib/Driver/ToolChains/Gnu.cpp | 3 ---
- 1 file changed, 3 deletions(-)
-
-diff --git a/lib/Driver/ToolChains/Gnu.cpp b/lib/Driver/ToolChains/Gnu.cpp
-index fe3c0191bb..c6a482bece 100644
---- a/lib/Driver/ToolChains/Gnu.cpp
-+++ b/lib/Driver/ToolChains/Gnu.cpp
-@@ -446,9 +446,6 @@ void tools::gnutools::Linker::ConstructJob(Compilation &C, const JobAction &JA,
-                            ToolChain.isPIEDefault(Args));
-       if (IsPIE)
-         CmdArgs.push_back("-pie");
--      CmdArgs.push_back("-dynamic-linker");
--      CmdArgs.push_back(Args.MakeArgString(Twine(D.DyldPrefix) +
--                                           ToolChain.getDynamicLinker(Args)));
-     }
-   }
- 
--- 
-2.11.0
diff --git a/pkgs/development/compilers/llvm/common/default.nix b/pkgs/development/compilers/llvm/common/default.nix
index 1ec50ce87db3..8aeffc5c8b12 100644
--- a/pkgs/development/compilers/llvm/common/default.nix
+++ b/pkgs/development/compilers/llvm/common/default.nix
@@ -72,10 +72,33 @@ let
       + "/${if (gitRelease != null) then "git" else lib.versions.major release_version}";
     getVersionFile =
       p:
-      builtins.path {
-        name = builtins.baseNameOf p;
-        path = "${metadata.versionDir}/${p}";
-      };
+      if
+        (lib.versionOlder release_version "14" || lib.versionAtLeast release_version "19")
+        && p == "clang/gnu-install-dirs.patch"
+      then
+        builtins.path {
+          name = builtins.baseNameOf p;
+          path = if lib.versionAtLeast release_version "19" then ../19/${p} else ../12/${p};
+        }
+      else if lib.versionAtLeast release_version "18" && p == "clang/purity.patch" then
+        builtins.path {
+          name = builtins.baseNameOf p;
+          path = ../18/${p};
+        }
+      else if
+        lib.versionAtLeast release_version "15"
+        && lib.versionOlder release_version "17"
+        && p == "clang/purity.patch"
+      then
+        builtins.path {
+          name = builtins.baseNameOf p;
+          path = ../15/${p};
+        }
+      else
+        builtins.path {
+          name = builtins.baseNameOf p;
+          path = "${metadata.versionDir}/${p}";
+        };
   };
 
   lldbPlugins = lib.makeExtensible (
diff --git a/pkgs/development/compilers/llvm/git/clang/gnu-install-dirs.patch b/pkgs/development/compilers/llvm/git/clang/gnu-install-dirs.patch
deleted file mode 100644
index b8c1c110cf22..000000000000
--- a/pkgs/development/compilers/llvm/git/clang/gnu-install-dirs.patch
+++ /dev/null
@@ -1,71 +0,0 @@
-diff --git a/cmake/modules/AddClang.cmake b/cmake/modules/AddClang.cmake
-index 75b0080f6..c895b884c 100644
---- a/cmake/modules/AddClang.cmake
-+++ b/cmake/modules/AddClang.cmake
-@@ -119,8 +119,8 @@ macro(add_clang_library name)
-         install(TARGETS ${lib}
-           COMPONENT ${lib}
-           ${export_to_clangtargets}
--          LIBRARY DESTINATION lib${LLVM_LIBDIR_SUFFIX}
--          ARCHIVE DESTINATION lib${LLVM_LIBDIR_SUFFIX}
-+          LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}${LLVM_LIBDIR_SUFFIX}"
-+          ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}${LLVM_LIBDIR_SUFFIX}"
-           RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}")
- 
-         if (NOT LLVM_ENABLE_IDE)
-diff --git a/lib/Headers/CMakeLists.txt b/lib/Headers/CMakeLists.txt
-index e6ae4e19e..5ef01aea2 100644
---- a/lib/Headers/CMakeLists.txt
-+++ b/lib/Headers/CMakeLists.txt
-@@ -337,6 +337,7 @@ set(llvm_libc_wrapper_files
- 
- include(GetClangResourceDir)
- get_clang_resource_dir(output_dir PREFIX ${LLVM_LIBRARY_OUTPUT_INTDIR}/.. SUBDIR include)
-+set(header_install_dir ${CMAKE_INSTALL_LIBDIR}${LLVM_LIBDIR_SUFFIX}/clang/${CLANG_VERSION_MAJOR}/include)
- set(out_files)
- set(generated_files)
- 
-diff --git a/tools/libclang/CMakeLists.txt b/tools/libclang/CMakeLists.txt
-index b5b6d2807..6b592d255 100644
---- a/tools/libclang/CMakeLists.txt
-+++ b/tools/libclang/CMakeLists.txt
-@@ -246,7 +246,7 @@ foreach(PythonVersion ${CLANG_PYTHON_BINDINGS_VERSIONS})
-           COMPONENT
-             libclang-python-bindings
-           DESTINATION
--            "lib${LLVM_LIBDIR_SUFFIX}/python${PythonVersion}/site-packages")
-+            "${CMAKE_INSTALL_LIBDIR}${LLVM_LIBDIR_SUFFIX}/python${PythonVersion}/site-packages")
- endforeach()
- if(NOT LLVM_ENABLE_IDE)
-   add_custom_target(libclang-python-bindings)
-diff --git a/tools/scan-build-py/CMakeLists.txt b/tools/scan-build-py/CMakeLists.txt
-index 3aca22c0b..3115353e3 100644
---- a/tools/scan-build-py/CMakeLists.txt
-+++ b/tools/scan-build-py/CMakeLists.txt
-@@ -88,7 +88,7 @@ foreach(lib ${LibScanbuild})
-                      DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/lib/libscanbuild/${lib})
-   list(APPEND Depends ${CMAKE_BINARY_DIR}/lib/libscanbuild/${lib})
-   install(FILES lib/libscanbuild/${lib}
--          DESTINATION lib${CLANG_LIBDIR_SUFFIX}/libscanbuild
-+          DESTINATION "${CMAKE_INSTALL_LIBDIR}/libscanbuild"
-           COMPONENT scan-build-py)
- endforeach()
- 
-@@ -106,7 +106,7 @@ foreach(resource ${LibScanbuildResources})
-                      DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/lib/libscanbuild/resources/${resource})
-   list(APPEND Depends ${CMAKE_BINARY_DIR}/lib/libscanbuild/resources/${resource})
-   install(FILES lib/libscanbuild/resources/${resource}
--          DESTINATION lib${CLANG_LIBDIR_SUFFIX}/libscanbuild/resources
-+          DESTINATION "${CMAKE_INSTALL_LIBDIR}/libscanbuild/resources"
-           COMPONENT scan-build-py)
- endforeach()
- 
-@@ -122,7 +122,7 @@ foreach(lib ${LibEar})
-                      DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/lib/libear/${lib})
-   list(APPEND Depends ${CMAKE_BINARY_DIR}/lib/libear/${lib})
-   install(FILES lib/libear/${lib}
--          DESTINATION lib${CLANG_LIBDIR_SUFFIX}/libear
-+          DESTINATION "${CMAKE_INSTALL_LIBDIR}/libear"
-           COMPONENT scan-build-py)
- endforeach()
- 
diff --git a/pkgs/development/compilers/llvm/git/clang/purity.patch b/pkgs/development/compilers/llvm/git/clang/purity.patch
deleted file mode 100644
index 5ce14a3479a0..000000000000
--- a/pkgs/development/compilers/llvm/git/clang/purity.patch
+++ /dev/null
@@ -1,25 +0,0 @@
-From 4add81bba40dcec62c4ea4481be8e35ac53e89d8 Mon Sep 17 00:00:00 2001
-From: Will Dietz <w@wdtz.org>
-Date: Thu, 18 May 2017 11:56:12 -0500
-Subject: [PATCH] "purity" patch for 5.0
-
----
- lib/Driver/ToolChains/Gnu.cpp | 3 ---
- 1 file changed, 3 deletions(-)
-
-diff --git a/lib/Driver/ToolChains/Gnu.cpp b/lib/Driver/ToolChains/Gnu.cpp
-index fe3c0191bb..c6a482bece 100644
---- a/lib/Driver/ToolChains/Gnu.cpp
-+++ b/lib/Driver/ToolChains/Gnu.cpp
-@@ -446,9 +446,6 @@ void tools::gnutools::Linker::ConstructJob(Compilation &C, const JobAction &JA,
-                            ToolChain.isPIEDefault(Args));
-       if (IsPIE)
-         CmdArgs.push_back("-pie");
--      CmdArgs.push_back("-dynamic-linker");
--      CmdArgs.push_back(Args.MakeArgString(Twine(D.DyldPrefix) +
--                                           ToolChain.getDynamicLinker(Args)));
-     }
-   }
- 
--- 
-2.11.0