diff --git a/clang/lib/Driver/ToolChains/SYCL.cpp b/clang/lib/Driver/ToolChains/SYCL.cpp
index 12c34ef6e615d..2412f50112862 100644
--- a/clang/lib/Driver/ToolChains/SYCL.cpp
+++ b/clang/lib/Driver/ToolChains/SYCL.cpp
@@ -1812,22 +1812,18 @@ void SYCLToolChain::AddSYCLIncludeArgs(const clang::driver::Driver &Driver,
                                        const ArgList &DriverArgs,
                                        ArgStringList &CC1Args) {
   // Add the SYCL header search locations in the specified order.
-  //   ../include/sycl
   //   ../include/sycl/stl_wrappers
   //   ../include
   SmallString<128> IncludePath(Driver.Dir);
   llvm::sys::path::append(IncludePath, "..");
   llvm::sys::path::append(IncludePath, "include");
-  SmallString<128> SYCLPath(IncludePath);
-  llvm::sys::path::append(SYCLPath, "sycl");
   // This is used to provide our wrappers around STL headers that provide
   // additional functions/template specializations when the user includes those
   // STL headers in their programs (e.g., <complex>).
-  SmallString<128> STLWrappersPath(SYCLPath);
+  SmallString<128> STLWrappersPath(IncludePath);
+  llvm::sys::path::append(STLWrappersPath, "sycl");
   llvm::sys::path::append(STLWrappersPath, "stl_wrappers");
   CC1Args.push_back("-internal-isystem");
-  CC1Args.push_back(DriverArgs.MakeArgString(SYCLPath));
-  CC1Args.push_back("-internal-isystem");
   CC1Args.push_back(DriverArgs.MakeArgString(STLWrappersPath));
   CC1Args.push_back("-internal-isystem");
   CC1Args.push_back(DriverArgs.MakeArgString(IncludePath));
diff --git a/clang/test/Driver/sycl-device-old-model.cpp b/clang/test/Driver/sycl-device-old-model.cpp
index 67ba53cfc2526..8fc8bfb86f929 100644
--- a/clang/test/Driver/sycl-device-old-model.cpp
+++ b/clang/test/Driver/sycl-device-old-model.cpp
@@ -6,7 +6,7 @@
 /// Check "-fsycl-is-device" is passed when compiling for device:
 // RUN:   %clang -### -fsycl-device-only --no-offload-new-driver %s 2>&1 \
 // RUN:   | FileCheck -check-prefix=CHECK-SYCL-DEV %s
-// CHECK-SYCL-DEV: "-fsycl-is-device"{{.*}} "-internal-isystem" "{{.*}}bin{{[/\\]+}}..{{[/\\]+}}include{{[/\\]+}}sycl" "-internal-isystem" "{{.*}}bin{{[/\\]+}}..{{[/\\]+}}include"
+// CHECK-SYCL-DEV: "-fsycl-is-device"{{.*}} "-internal-isystem" "{{.*}}bin{{[/\\]+}}..{{[/\\]+}}include{{[/\\]+}}sycl{{[/\\]+}}stl_wrappers" "-internal-isystem" "{{[^"]*}}bin{{[/\\]+}}..{{[/\\]+}}include"
 
 /// Check that "-Wno-sycl-strict" is set on compiler invocation with "-fsycl"
 /// or "-fsycl-device-only" or both:
diff --git a/clang/test/Driver/sycl-device.cpp b/clang/test/Driver/sycl-device.cpp
index 734e432007bb8..ba14a409bf795 100644
--- a/clang/test/Driver/sycl-device.cpp
+++ b/clang/test/Driver/sycl-device.cpp
@@ -8,7 +8,7 @@
 // RUN:   | FileCheck -check-prefix=CHECK-SYCL-DEV %s
 // RUN:   %clang -### --config=%S/Inputs/empty.cfg -fsycl-device-only %s 2>&1 \
 // RUN:   | FileCheck -check-prefix=CHECK-SYCL-DEV %s
-// CHECK-SYCL-DEV: "-fsycl-is-device"{{.*}} "-internal-isystem" "{{.*}}bin{{[/\\]+}}..{{[/\\]+}}include{{[/\\]+}}sycl" "-internal-isystem" "{{.*}}bin{{[/\\]+}}..{{[/\\]+}}include"
+// CHECK-SYCL-DEV: "-fsycl-is-device"{{.*}} "-internal-isystem" "{{.*}}bin{{[/\\]+}}..{{[/\\]+}}include{{[/\\]+}}sycl{{[/\\]+}}stl_wrappers" "-internal-isystem" "{{.*}}bin{{[/\\]+}}..{{[/\\]+}}include"
 
 /// Check that "-Wno-sycl-strict" is set on compiler invocation with "-fsycl"
 /// or "-fsycl-device-only" or both:
diff --git a/clang/test/Driver/sycl-int-footer-old-model.cpp b/clang/test/Driver/sycl-int-footer-old-model.cpp
index 649a81aa64313..caa6000fad90c 100644
--- a/clang/test/Driver/sycl-int-footer-old-model.cpp
+++ b/clang/test/Driver/sycl-int-footer-old-model.cpp
@@ -78,7 +78,7 @@
 // DEP_GEN:  clang{{.*}} "-fsycl-is-device"
 // DEP_GEN-SAME: "-dependency-file" "[[DEPFILE:.+\.d]]"
 // DEP_GEN-SAME: "-MT"
-// DEP_GEN-SAME: "-internal-isystem" "{{.*}}{{[/\\]+}}include{{[/\\]+}}sycl"
+// DEP_GEN-SAME: "-internal-isystem" "{{.*}}{{[/\\]+}}include{{[/\\]+}}sycl{{[/\\]+}}stl_wrappers"
 // DEP_GEN-SAME: "-x" "c++" "[[INPUTFILE:.+\.cpp]]"
 // DEP_GEN: clang{{.*}} "-fsycl-is-host"
 // DEP_GEN-SAME: "-dependency-file" "[[DEPFILE]]"
diff --git a/clang/test/Driver/sycl-int-footer.cpp b/clang/test/Driver/sycl-int-footer.cpp
index 730c4b3f7ed82..8186e41de65bc 100644
--- a/clang/test/Driver/sycl-int-footer.cpp
+++ b/clang/test/Driver/sycl-int-footer.cpp
@@ -66,7 +66,7 @@
 // DEP_GEN:  clang{{.*}} "-fsycl-is-device"
 // DEP_GEN-SAME: "-dependency-file" "[[DEPFILE:.+\.d]]"
 // DEP_GEN-SAME: "-MT"
-// DEP_GEN-SAME: "-internal-isystem" "{{.*}}{{[/\\]+}}include{{[/\\]+}}sycl"
+// DEP_GEN-SAME: "-internal-isystem" "{{.*}}{{[/\\]+}}include{{[/\\]+}}sycl{{[/\\]+}}stl_wrappers"
 // DEP_GEN-SAME: "-x" "c++" "[[INPUTFILE:.+\.cpp]]"
 // DEP_GEN: clang{{.*}} "-fsycl-is-host"
 // DEP_GEN-SAME: "-dependency-file" "[[DEPFILE]]"
diff --git a/clang/test/Driver/sycl-offload-amdgcn.cpp b/clang/test/Driver/sycl-offload-amdgcn.cpp
index 389cdc641119c..636b1354b143d 100644
--- a/clang/test/Driver/sycl-offload-amdgcn.cpp
+++ b/clang/test/Driver/sycl-offload-amdgcn.cpp
@@ -19,7 +19,7 @@
 // RUN: -fsycl-targets=amdgcn-amd-amdhsa -Xsycl-target-backend --offload-arch=gfx906 -nogpulib\
 // RUN: -fsycl-libspirv-path=%S/Inputs/SYCL/libspirv.bc %s 2>&1 \
 // RUN: | FileCheck -check-prefix=CHK-ACTIONS %s
-// CHK-ACTIONS: "-cc1" "-triple" "amdgcn-amd-amdhsa" "-aux-triple" "x86_64-unknown-linux-gnu"{{.*}} "-fsycl-is-device"{{.*}} "-Wno-sycl-strict"{{.*}} "-sycl-std=2020" {{.*}} "-internal-isystem" "{{.*}}bin{{[/\\]+}}..{{[/\\]+}}include{{[/\\]+}}sycl"{{.*}} "-mlink-builtin-bitcode" "{{.*}}libspirv.bc"{{.*}} "-target-cpu" "gfx906"{{.*}} "-std=c++11"{{.*}}
+// CHK-ACTIONS: "-cc1" "-triple" "amdgcn-amd-amdhsa" "-aux-triple" "x86_64-unknown-linux-gnu"{{.*}} "-fsycl-is-device"{{.*}} "-Wno-sycl-strict"{{.*}} "-sycl-std=2020" {{.*}} "-internal-isystem" "{{.*}}bin{{[/\\]+}}..{{[/\\]+}}include{{[/\\]+}}sycl{{[/\\]+}}stl_wrappers"{{.*}} "-mlink-builtin-bitcode" "{{.*}}libspirv.bc"{{.*}} "-target-cpu" "gfx906"{{.*}} "-std=c++11"{{.*}}
 // CHK-ACTIONS-NOT: "-mllvm -sycl-opt"
 // CHK-ACTIONS: clang-offload-wrapper"{{.*}} "-host=x86_64-unknown-linux-gnu" "-compile-opts=--offload-arch=gfx906" "-target=amdgcn" "-kind=sycl"{{.*}}
 
diff --git a/clang/test/Driver/sycl-offload-header-check.cpp b/clang/test/Driver/sycl-offload-header-check.cpp
index 7752745d781d6..acb84ec93830d 100644
--- a/clang/test/Driver/sycl-offload-header-check.cpp
+++ b/clang/test/Driver/sycl-offload-header-check.cpp
@@ -10,6 +10,6 @@
 // RUN: %clang -### -fsycl %s 2>&1 | \
 // RUN: FileCheck --check-prefix=CHECK-HEADER %s
 // CHECK-HEADER: clang{{.*}} "-fsycl-int-header=[[HEADER:.+\.h]]"
-// CHECK-HEADER: {{.*}} "-internal-isystem" "{{.*}}bin{{[/\\]+}}..{{[/\\]+}}include{{[/\\]+}}sycl"
+// CHECK-HEADER: {{.*}} "-internal-isystem" "{{.*}}bin{{[/\\]+}}..{{[/\\]+}}include{{[/\\]+}}sycl{{[/\\]+}}stl_wrappers"
 // CHECK-HEADER-NOT: clang{{.*}} "-include" "[[HEADER]]"
 // CHECK-HEADER: clang{{.*}} "-include" "{{.*}}_dirname{{.+}}.h"
diff --git a/clang/test/Driver/sycl-offload-intelfpga.cpp b/clang/test/Driver/sycl-offload-intelfpga.cpp
index cf6b2979b8ff0..cc30d23ebfe87 100644
--- a/clang/test/Driver/sycl-offload-intelfpga.cpp
+++ b/clang/test/Driver/sycl-offload-intelfpga.cpp
@@ -7,7 +7,7 @@
 // RUN:   | FileCheck -check-prefix=CHK-HEADERS-INTELFPGA %s
 // RUN:   %clangxx -### -target x86_64-unknown-linux-gnu -fsycl -fsycl-targets=spir64_fpga-unknown-unknown %s 2>&1 \
 // RUN:   | FileCheck -check-prefix=CHK-HEADERS-INTELFPGA %s
-// CHK-HEADERS-INTELFPGA: clang{{.*}} "-internal-isystem" "{{.*}}bin{{[/\\]+}}..{{[/\\]+}}include{{[/\\]+}}sycl"
+// CHK-HEADERS-INTELFPGA: clang{{.*}} "-internal-isystem" "{{.*}}bin{{[/\\]+}}..{{[/\\]+}}include{{[/\\]+}}sycl{{[/\\]+}}stl_wrappers"
 
 /// -fintelfpga implies -g and -MMD
 // RUN:   %clangxx -### -target x86_64-unknown-linux-gnu -fintelfpga -Xshardware %s 2>&1 \
diff --git a/clang/test/Driver/sycl-offload-nvptx.cpp b/clang/test/Driver/sycl-offload-nvptx.cpp
index 324c5aa9cdd0e..9c15f6ee27b77 100644
--- a/clang/test/Driver/sycl-offload-nvptx.cpp
+++ b/clang/test/Driver/sycl-offload-nvptx.cpp
@@ -13,7 +13,7 @@
 // RUN: -fsycl-libspirv-path=%S/Inputs/SYCL/libspirv.bc %s 2>&1 \
 // RUN: | FileCheck -check-prefix=CHK-ACTIONS-WIN %s
 
-// CHK-ACTIONS: "-cc1" "-triple" "nvptx64-nvidia-cuda" "-aux-triple" "x86_64-unknown-linux-gnu"{{.*}} "-fsycl-is-device"{{.*}} "-Wno-sycl-strict"{{.*}} "-sycl-std=2020" {{.*}} "-emit-llvm-bc" {{.*}} "-internal-isystem" "{{.*}}bin{{[/\\]+}}..{{[/\\]+}}include{{[/\\]+}}sycl"{{.*}} "-mlink-builtin-bitcode" "{{.*}}libspirv.bc"{{.*}} "-mlink-builtin-bitcode" "{{.*}}libdevice{{.*}}.10.bc"{{.*}} "-target-sdk-version=[[CUDA_VERSION:[0-9.]+]]"{{.*}} "-target-cpu" "sm_50"{{.*}} "-target-feature" "+ptx42"{{.*}} "-std=c++11"{{.*}}
+// CHK-ACTIONS: "-cc1" "-triple" "nvptx64-nvidia-cuda" "-aux-triple" "x86_64-unknown-linux-gnu"{{.*}} "-fsycl-is-device"{{.*}} "-Wno-sycl-strict"{{.*}} "-sycl-std=2020" {{.*}} "-emit-llvm-bc" {{.*}} "-internal-isystem" "{{.*}}bin{{[/\\]+}}..{{[/\\]+}}include{{[/\\]+}}sycl{{[/\\]+}}stl_wrappers"{{.*}} "-mlink-builtin-bitcode" "{{.*}}libspirv.bc"{{.*}} "-mlink-builtin-bitcode" "{{.*}}libdevice{{.*}}.10.bc"{{.*}} "-target-sdk-version=[[CUDA_VERSION:[0-9.]+]]"{{.*}} "-target-cpu" "sm_50"{{.*}} "-target-feature" "+ptx42"{{.*}} "-std=c++11"{{.*}}
 // CHK-ACTIONS: sycl-post-link{{.*}} "-split=auto"
 // CHK-ACTIONS: file-table-tform" "-extract=Code" "-drop_titles"
 // CHK-ACTIONS: llvm-foreach" {{.*}} "--" "{{.*}}clang-{{[0-9]+}}"
@@ -23,7 +23,7 @@
 // CHK-ACTIONS-NOT: "-mllvm -sycl-opt"
 // CHK-ACTIONS: clang-offload-wrapper"{{.*}} "-host=x86_64-unknown-linux-gnu" "-target=nvptx64" "-kind=sycl"{{.*}}
 
-// CHK-ACTIONS-WIN: "-cc1" "-triple" "nvptx64-nvidia-cuda" "-aux-triple" "x86_64-pc-windows-msvc"{{.*}} "-fsycl-is-device"{{.*}} "-Wno-sycl-strict"{{.*}} "-sycl-std=2020" {{.*}} "-emit-llvm-bc" {{.*}} "-internal-isystem" "{{.*}}bin{{[/\\]+}}..{{[/\\]+}}include{{[/\\]+}}sycl"{{.*}} "-mlink-builtin-bitcode" "{{.*}}libspirv.bc"{{.*}} "-mlink-builtin-bitcode" "{{.*}}libdevice{{.*}}.10.bc"{{.*}} "-target-sdk-version=[[CUDA_VERSION:[0-9.]+]]"{{.*}} "-target-cpu" "sm_50"{{.*}} "-target-feature" "+ptx42"{{.*}}
+// CHK-ACTIONS-WIN: "-cc1" "-triple" "nvptx64-nvidia-cuda" "-aux-triple" "x86_64-pc-windows-msvc"{{.*}} "-fsycl-is-device"{{.*}} "-Wno-sycl-strict"{{.*}} "-sycl-std=2020" {{.*}} "-emit-llvm-bc" {{.*}} "-internal-isystem" "{{.*}}bin{{[/\\]+}}..{{[/\\]+}}include{{[/\\]+}}sycl{{[/\\]+}}stl_wrappers"{{.*}} "-mlink-builtin-bitcode" "{{.*}}libspirv.bc"{{.*}} "-mlink-builtin-bitcode" "{{.*}}libdevice{{.*}}.10.bc"{{.*}} "-target-sdk-version=[[CUDA_VERSION:[0-9.]+]]"{{.*}} "-target-cpu" "sm_50"{{.*}} "-target-feature" "+ptx42"{{.*}}
 // CHK-ACTIONS-WIN: sycl-post-link{{.*}} "-split=auto"
 // CHK-ACTIONS-WIN: file-table-tform" "-extract=Code" "-drop_titles"
 // CHK-ACTIONS-WIN: llvm-foreach" {{.*}} "--" "{{.*}}clang-{{[0-9]+}}"
diff --git a/clang/test/Driver/sycl-offload-old-model.c b/clang/test/Driver/sycl-offload-old-model.c
index bc310be7ae58f..685ada6119c93 100644
--- a/clang/test/Driver/sycl-offload-old-model.c
+++ b/clang/test/Driver/sycl-offload-old-model.c
@@ -782,14 +782,10 @@
 // RUN: %clang -### -fsycl --no-offload-new-driver %s 2>&1 | FileCheck %s -check-prefixes=CHECK-HEADER-DIR
 // RUN: %clang_cl -### -fsycl --no-offload-new-driver %s 2>&1 | FileCheck %s -check-prefixes=CHECK-HEADER-DIR
 // CHECK-HEADER-DIR: clang{{.*}} "-fsycl-is-device"
-// CHECK-HEADER-DIR-SAME: "-internal-isystem" "[[ROOT:[^"]*]]bin{{[/\\]+}}..{{[/\\]+}}include{{[/\\]+}}sycl"
-// CHECK-HEADER-DIR-NOT: -internal-isystem
-// CHECK-HEADER-DIR-SAME: "-internal-isystem" "[[ROOT]]bin{{[/\\]+}}..{{[/\\]+}}include{{[/\\]+}}sycl{{[/\\]+}}stl_wrappers"
+// CHECK-HEADER-DIR-SAME: "-internal-isystem" "[[ROOT:[^"]*]]bin{{[/\\]+}}..{{[/\\]+}}include{{[/\\]+}}sycl{{[/\\]+}}stl_wrappers"
 // CHECK-HEADER-DIR-NOT: -internal-isystem
 // CHECK-HEADER-DIR-SAME: "-internal-isystem" "[[ROOT]]bin{{[/\\]+}}..{{[/\\]+}}include"
 // CHECK-HEADER-DIR: clang{{.*}} "-fsycl-is-host"
-// CHECK-HEADER-DIR-SAME: "-internal-isystem" "[[ROOT]]bin{{[/\\]+}}..{{[/\\]+}}include{{[/\\]+}}sycl"
-// CHECK-HEADER-DIR-NOT: -internal-isystem
 // CHECK-HEADER-DIR-SAME: "-internal-isystem" "[[ROOT]]bin{{[/\\]+}}..{{[/\\]+}}include{{[/\\]+}}sycl{{[/\\]+}}stl_wrappers"
 // CHECK-HEADER-DIR-NOT: -internal-isystem
 // CHECK-HEADER-DIR-SAME: "-internal-isystem" "[[ROOT]]bin{{[/\\]+}}..{{[/\\]+}}include"
diff --git a/clang/test/Driver/sycl-offload.c b/clang/test/Driver/sycl-offload.c
index 17602ad2ed614..4a11b7022c5f7 100644
--- a/clang/test/Driver/sycl-offload.c
+++ b/clang/test/Driver/sycl-offload.c
@@ -497,14 +497,10 @@
 // RUN: %clang -### -fsycl --offload-new-driver %s 2>&1 | FileCheck %s -check-prefixes=CHECK-HEADER-DIR
 // RUN: %clang_cl -### -fsycl --offload-new-driver %s 2>&1 | FileCheck %s -check-prefixes=CHECK-HEADER-DIR
 // CHECK-HEADER-DIR: clang{{.*}} "-fsycl-is-device"
-// CHECK-HEADER-DIR-SAME: "-internal-isystem" "[[ROOT:[^"]*]]bin{{[/\\]+}}..{{[/\\]+}}include{{[/\\]+}}sycl"
-// CHECK-HEADER-DIR-NOT: -internal-isystem
-// CHECK-HEADER-DIR-SAME: "-internal-isystem" "[[ROOT]]bin{{[/\\]+}}..{{[/\\]+}}include{{[/\\]+}}sycl{{[/\\]+}}stl_wrappers"
+// CHECK-HEADER-DIR-SAME: "-internal-isystem" "[[ROOT:[^"]*]]bin{{[/\\]+}}..{{[/\\]+}}include{{[/\\]+}}sycl{{[/\\]+}}stl_wrappers"
 // CHECK-HEADER-DIR-NOT: -internal-isystem
 // CHECK-HEADER-DIR-SAME: "-internal-isystem" "[[ROOT]]bin{{[/\\]+}}..{{[/\\]+}}include"
 // CHECK-HEADER-DIR: clang{{.*}} "-fsycl-is-host"
-// CHECK-HEADER-DIR-SAME: "-internal-isystem" "[[ROOT]]bin{{[/\\]+}}..{{[/\\]+}}include{{[/\\]+}}sycl"
-// CHECK-HEADER-DIR-NOT: -internal-isystem
 // CHECK-HEADER-DIR-SAME: "-internal-isystem" "[[ROOT]]bin{{[/\\]+}}..{{[/\\]+}}include{{[/\\]+}}sycl{{[/\\]+}}stl_wrappers"
 // CHECK-HEADER-DIR-NOT: -internal-isystem
 // CHECK-HEADER-DIR-SAME: "-internal-isystem" "[[ROOT]]bin{{[/\\]+}}..{{[/\\]+}}include"
diff --git a/clang/test/Driver/sycl.c b/clang/test/Driver/sycl.c
index 322315673b4e1..70bd1467e24c1 100644
--- a/clang/test/Driver/sycl.c
+++ b/clang/test/Driver/sycl.c
@@ -13,7 +13,7 @@
 
 // ENABLED: "-cc1"{{.*}} "-fsycl-is-device"
 // ENABLED-SAME: "-sycl-std={{[-.sycl0-9]+}}"
-// ENABLED-SAME: "-internal-isystem" "{{.*}}bin{{[/\\]+}}..{{[/\\]+}}include{{[/\\]+}}sycl"
+// ENABLED-SAME: "-internal-isystem" "{{.*}}bin{{[/\\]+}}..{{[/\\]+}}include{{[/\\]+}}sycl{{[/\\]+}}stl_wrappers"
 
 // NOT_ENABLED-NOT: "-fsycl-is-device"
 // NOT_ENABLED-NOT: "-fsycl-std-layout-kernel-params"
@@ -44,7 +44,7 @@
 // RUN: %clang_cl -### --target=i386-pc-windows-msvc -fsycl-device-only %s 2>&1 | FileCheck %s --check-prefix=DEFAULT -DSPIRARCH=spir
 
 // DEFAULT: "-triple" "[[SPIRARCH]]-unknown-{{.*}}"{{.*}} "-fsycl-is-device"{{.*}} "-sycl-std=2020"{{.*}} "-emit-llvm-bc"
-// DEFAULT: "-internal-isystem" "{{.*}}bin{{[/\\]+}}..{{[/\\]+}}include{{[/\\]+}}sycl"
+// DEFAULT: "-internal-isystem" "{{.*}}bin{{[/\\]+}}..{{[/\\]+}}include{{[/\\]+}}sycl{{[/\\]+}}stl_wrappers"
 // DEFAULT: "-internal-isystem" "{{.*lib.*clang.*include}}"
 // DEFAULT: "-std=c++17"
 // DEFAULT-NOT: "{{.*}}llvm-spirv"{{.*}}
diff --git a/sycl/CMakeLists.txt b/sycl/CMakeLists.txt
index 1bc03edd866ce..2470ccac77a1d 100644
--- a/sycl/CMakeLists.txt
+++ b/sycl/CMakeLists.txt
@@ -160,12 +160,11 @@ endif()
 # Copy OpenCL Headers into sycl headers build directory
 # Compiler does automatic lookup bin/../include based on clang binary location,
 # e.g. when run LIT tests
-file(COPY ${OpenCL_INCLUDE_DIR}/CL
-     DESTINATION ${SYCL_INCLUDE_BUILD_DIR}/sycl)
+file(COPY ${OpenCL_INCLUDE_DIR}/CL DESTINATION ${SYCL_INCLUDE_BUILD_DIR})
 
 # Include OpenCL Headers into final bundle.
 install(DIRECTORY ${OpenCL_INCLUDE_DIR}/CL
-        DESTINATION ${SYCL_INCLUDE_DIR}/sycl
+        DESTINATION ${SYCL_INCLUDE_DIR}
         COMPONENT OpenCL-Headers)
 
 # Option for enabling building the SYCL major release preview library.
@@ -220,7 +219,7 @@ file(GLOB_RECURSE HEADERS_IN_SYCLCOMPAT_DIR CONFIGURE_DEPENDS "${sycl_inc_dir}/s
 
 string(REPLACE "${sycl_inc_dir}" "${SYCL_INCLUDE_BUILD_DIR}"
   OUT_HEADERS_IN_SYCL_DIR "${HEADERS_IN_SYCL_DIR}")
-string(REPLACE "${sycl_inc_dir}/CL" "${SYCL_INCLUDE_BUILD_DIR}/sycl/CL"
+string(REPLACE "${sycl_inc_dir}/CL" "${SYCL_INCLUDE_BUILD_DIR}/CL"
   OUT_HEADERS_IN_CL_DIR "${HEADERS_IN_CL_DIR}")
 string(REPLACE "${sycl_inc_dir}" "${SYCL_INCLUDE_BUILD_DIR}"
   OUT_HEADERS_IN_STD_DIR "${HEADERS_IN_STD_DIR}")
@@ -245,27 +244,27 @@ add_custom_command(
           ${HEADERS_IN_STD_DIR}
           ${HEADERS_IN_SYCLCOMPAT_DIR}
   COMMAND ${CMAKE_COMMAND} -E copy_directory ${sycl_inc_dir}/sycl ${SYCL_INCLUDE_BUILD_DIR}/sycl
-  COMMAND ${CMAKE_COMMAND} -E copy_directory ${sycl_inc_dir}/CL ${SYCL_INCLUDE_BUILD_DIR}/sycl/CL
+  COMMAND ${CMAKE_COMMAND} -E copy_directory ${sycl_inc_dir}/CL ${SYCL_INCLUDE_BUILD_DIR}/CL
   COMMAND ${CMAKE_COMMAND} -E copy_directory ${sycl_inc_dir}/std ${SYCL_INCLUDE_BUILD_DIR}/std
   COMMAND ${CMAKE_COMMAND} -E copy_directory ${sycl_inc_dir}/syclcompat ${SYCL_INCLUDE_BUILD_DIR}/syclcompat
   COMMAND ${CMAKE_COMMAND} -E copy ${sycl_inc_dir}/syclcompat.hpp ${SYCL_INCLUDE_BUILD_DIR}/syclcompat.hpp
-  COMMAND ${CMAKE_COMMAND} -E copy ${UNIFIED_RUNTIME_INCLUDE_DIR}/ur_api.h ${SYCL_INCLUDE_BUILD_DIR}/sycl
-  COMMAND ${CMAKE_COMMAND} -E copy ${UNIFIED_RUNTIME_INCLUDE_DIR}/ur_api_funcs.def ${SYCL_INCLUDE_BUILD_DIR}/sycl
-  COMMAND ${CMAKE_COMMAND} -E copy ${UNIFIED_RUNTIME_INCLUDE_DIR}/ur_print.hpp ${SYCL_INCLUDE_BUILD_DIR}/sycl
+  COMMAND ${CMAKE_COMMAND} -E copy ${UNIFIED_RUNTIME_INCLUDE_DIR}/ur_api.h ${SYCL_INCLUDE_BUILD_DIR}
+  COMMAND ${CMAKE_COMMAND} -E copy ${UNIFIED_RUNTIME_INCLUDE_DIR}/ur_api_funcs.def ${SYCL_INCLUDE_BUILD_DIR}
+  COMMAND ${CMAKE_COMMAND} -E copy ${UNIFIED_RUNTIME_INCLUDE_DIR}/ur_print.hpp ${SYCL_INCLUDE_BUILD_DIR}
   COMMENT "Copying SYCL headers ...")
 
 # Copy SYCL headers from source to install directory
 install(DIRECTORY "${sycl_inc_dir}/sycl" DESTINATION ${SYCL_INCLUDE_DIR} COMPONENT sycl-headers)
-install(DIRECTORY "${sycl_inc_dir}/CL" DESTINATION ${SYCL_INCLUDE_DIR}/sycl COMPONENT sycl-headers)
+install(DIRECTORY "${sycl_inc_dir}/CL" DESTINATION ${SYCL_INCLUDE_DIR}/ COMPONENT sycl-headers)
 install(DIRECTORY "${sycl_inc_dir}/std" DESTINATION ${SYCL_INCLUDE_DIR} COMPONENT sycl-headers)
 install(DIRECTORY ${BOOST_MP11_DESTINATION_DIR} DESTINATION ${SYCL_INCLUDE_DIR}/sycl/detail COMPONENT boost_mp11-headers)
 install(DIRECTORY "${sycl_inc_dir}/syclcompat" DESTINATION ${SYCL_INCLUDE_DIR} COMPONENT sycl-headers)
 install(FILES "${sycl_inc_dir}/syclcompat.hpp" DESTINATION ${SYCL_INCLUDE_DIR} COMPONENT sycl-headers)
-install(FILES "${UNIFIED_RUNTIME_INCLUDE_DIR}/ur_api.h" DESTINATION ${SYCL_INCLUDE_DIR}/sycl
+install(FILES "${UNIFIED_RUNTIME_INCLUDE_DIR}/ur_api.h" DESTINATION ${SYCL_INCLUDE_DIR}
   COMPONENT sycl-headers)
-install(FILES "${UNIFIED_RUNTIME_INCLUDE_DIR}/ur_api_funcs.def" DESTINATION ${SYCL_INCLUDE_DIR}/sycl
+install(FILES "${UNIFIED_RUNTIME_INCLUDE_DIR}/ur_api_funcs.def" DESTINATION ${SYCL_INCLUDE_DIR}
   COMPONENT sycl-headers)
-install(FILES "${UNIFIED_RUNTIME_INCLUDE_DIR}/ur_print.hpp" DESTINATION ${SYCL_INCLUDE_DIR}/sycl
+install(FILES "${UNIFIED_RUNTIME_INCLUDE_DIR}/ur_print.hpp" DESTINATION ${SYCL_INCLUDE_DIR}
   COMPONENT sycl-headers)
 
 if (WIN32)
diff --git a/sycl/include/sycl/ext/oneapi/bindless_images_mem_handle.hpp b/sycl/include/sycl/ext/oneapi/bindless_images_mem_handle.hpp
index 80f2563d43191..0d859fb9e3288 100644
--- a/sycl/include/sycl/ext/oneapi/bindless_images_mem_handle.hpp
+++ b/sycl/include/sycl/ext/oneapi/bindless_images_mem_handle.hpp
@@ -8,7 +8,7 @@
 
 #pragma once
 
-#include "sycl/ur_api.h"
+#include <ur_api.h>
 
 namespace sycl {
 inline namespace _V1 {
diff --git a/sycl/include/syclcompat/kernel.hpp b/sycl/include/syclcompat/kernel.hpp
index 7c99e02a4ba82..8fdabf6a47765 100644
--- a/sycl/include/syclcompat/kernel.hpp
+++ b/sycl/include/syclcompat/kernel.hpp
@@ -47,9 +47,9 @@
 #endif
 
 #include <fstream>
-#include <image.hpp>
 #include <random>
 
+#include <sycl/image.hpp>
 #include <sycl/info/info_desc.hpp>
 #include <sycl/nd_range.hpp>
 #include <sycl/queue.hpp>
diff --git a/sycl/test-e2e/ESIMD/regression/bfloat16Constructor.cpp b/sycl/test-e2e/ESIMD/regression/bfloat16Constructor.cpp
index 54af5353aefb7..16b7af9452c95 100644
--- a/sycl/test-e2e/ESIMD/regression/bfloat16Constructor.cpp
+++ b/sycl/test-e2e/ESIMD/regression/bfloat16Constructor.cpp
@@ -10,9 +10,9 @@
 //===----------------------------------------------------------------------===//
 // This is basic test to verify use of bfloat16 constructor in kernel.
 
-#include <ext/intel/esimd.hpp>
 #include <iostream>
 #include <sycl/detail/core.hpp>
+#include <sycl/ext/intel/esimd.hpp>
 #include <sycl/usm.hpp>
 
 using namespace sycl;
diff --git a/sycl/test/basic_tests/macros_no_rdc.cpp b/sycl/test/basic_tests/macros_no_rdc.cpp
index 4ffc0ec8d91ca..aed25568e6a6e 100644
--- a/sycl/test/basic_tests/macros_no_rdc.cpp
+++ b/sycl/test/basic_tests/macros_no_rdc.cpp
@@ -23,6 +23,6 @@
 // HOST-DAG: #define SYCL_EXTERNAL
 // HOST-DAG: #define __DPCPP_SYCL_EXTERNAL
 #include <sycl/sycl.hpp>
-#include "ext/oneapi/bfloat16.hpp"
-#include "ext/intel/esimd.hpp"
-#include "ext/oneapi/experimental/complex/complex.hpp"
+#include <sycl/ext/oneapi/bfloat16.hpp>
+#include <sycl/ext/intel/esimd.hpp>
+#include <sycl/ext/oneapi/experimental/complex/complex.hpp>
diff --git a/sycl/test/basic_tests/min_max_test.cpp b/sycl/test/basic_tests/min_max_test.cpp
index e91b3f18102e5..5b2e16c3c0cb0 100644
--- a/sycl/test/basic_tests/min_max_test.cpp
+++ b/sycl/test/basic_tests/min_max_test.cpp
@@ -1,11 +1,11 @@
 // REQUIRES: windows
-// RUN: %clangxx -fsycl -fsycl-device-only -fsyntax-only -Xclang -verify %s -I %sycl_include
-// RUN: %clangxx -fsycl -fpreview-breaking-changes -fsycl-device-only -fsyntax-only -Xclang -verify %s -I %sycl_include
+// RUN: %clangxx -fsycl -fsycl-device-only -fsyntax-only -Xclang -verify %s
+// RUN: %clangxx -fsycl -fpreview-breaking-changes -fsycl-device-only -fsyntax-only -Xclang -verify %s
 // expected-no-diagnostics
 
 #include "windows.h"
 
-#include "sycl.hpp"
+#include <sycl/sycl.hpp>
 
 int main() {
   int tmp = min(1, 4);
diff --git a/sycl/test/esimd/esimd-util-compiler-eval.cpp b/sycl/test/esimd/esimd-util-compiler-eval.cpp
index 9c5ee3ab50396..b77653555ce27 100644
--- a/sycl/test/esimd/esimd-util-compiler-eval.cpp
+++ b/sycl/test/esimd/esimd-util-compiler-eval.cpp
@@ -1,8 +1,8 @@
 // RUN: %clangxx -fsycl -fsycl-device-only -c %s
 // This test checks compile-time evaluation of functions from esimd_util.hpp
 
-#include "sycl.hpp"
-#include "sycl/ext/intel/esimd.hpp"
+#include <sycl/ext/intel/esimd.hpp>
+#include <sycl/sycl.hpp>
 
 using namespace sycl::ext::intel::esimd;
 using namespace sycl::ext::intel::esimd::detail;
diff --git a/sycl/test/esimd/esimd_verify_local_names.cpp b/sycl/test/esimd/esimd_verify_local_names.cpp
index 14ae15bbed279..45ff2a22b504e 100644
--- a/sycl/test/esimd/esimd_verify_local_names.cpp
+++ b/sycl/test/esimd/esimd_verify_local_names.cpp
@@ -1,7 +1,7 @@
 // RUN: %clangxx -fsycl -fsycl-device-only -S %s -o /dev/null
 // Test that the ESIMD Verifier doesn't error on locally defined types
-#include <sycl.hpp>
 #include <sycl/ext/intel/esimd.hpp>
+#include <sycl/sycl.hpp>
 
 using namespace sycl::ext::intel::esimd;
 
diff --git a/sycl/test/include_deps/deps_known.sh b/sycl/test/include_deps/deps_known.sh
index 65dce35dc08df..d4b33541b0205 100644
--- a/sycl/test/include_deps/deps_known.sh
+++ b/sycl/test/include_deps/deps_known.sh
@@ -13,8 +13,10 @@ function deps() {
 
     clang++ -fsycl -fsycl-device-only -include "$HEADER" -c -x c++ /dev/null -o /dev/null  -MD -MF - \
         | sed 's@: /dev/null@: /dev/null\n@' \
-        | grep 'include/sycl\|/dev/null\|:' \
+        | grep 'include/sycl\|/dev/null\|CL/\|ur_\|:' \
         | sed 's@.*/include/sycl/@@' \
+        | sed 's@.*/include/CL/@CL/@' \
+        | sed 's@.*/include/ur_@ur_@' \
         | sed 's/ \\//'
 }
 
diff --git a/sycl/test/native_cpu/no-opt.cpp b/sycl/test/native_cpu/no-opt.cpp
index 7831d1d7af2ef..2e23e6eb98992 100644
--- a/sycl/test/native_cpu/no-opt.cpp
+++ b/sycl/test/native_cpu/no-opt.cpp
@@ -3,7 +3,7 @@
 // RUN: env ONEAPI_DEVICE_SELECTOR="native_cpu:cpu" %t
 // RUN: env ONEAPI_DEVICE_SELECTOR="native_cpu:cpu" SYCL_DEVICE_ALLOWLIST="BackendName:native_cpu" %t
 
-#include "sycl.hpp"
+#include <sycl/sycl.hpp>
 class Test1;
 int main() {
   const size_t N = 4;
diff --git a/sycl/test/regression/builtin_generic_ptr.cpp b/sycl/test/regression/builtin_generic_ptr.cpp
index 02245b627a6d4..565fb43616734 100644
--- a/sycl/test/regression/builtin_generic_ptr.cpp
+++ b/sycl/test/regression/builtin_generic_ptr.cpp
@@ -5,7 +5,7 @@
 // Regression test ensuring math builtins accept multi_ptr in the generic
 // address space.
 
-#include <sycl.hpp>
+#include <sycl/sycl.hpp>
 
 int main() {
   sycl::queue Q;
diff --git a/sycl/test/regression/unnamed-lambda-split-order.cpp b/sycl/test/regression/unnamed-lambda-split-order.cpp
index c423a98647994..8a946b8e70850 100644
--- a/sycl/test/regression/unnamed-lambda-split-order.cpp
+++ b/sycl/test/regression/unnamed-lambda-split-order.cpp
@@ -1,5 +1,5 @@
 // RUN: %clangxx -fsycl -fsycl-unnamed-lambda -fsyntax-only %s
-#include "sycl.hpp"
+#include <sycl/sycl.hpp>
 
 // This validates the case where using a lambda in a kernel in a different order
 // than the lexical order of the lambdas. In a previous implementation of
diff --git a/sycl/test/regression/unnamed-lambda.cpp b/sycl/test/regression/unnamed-lambda.cpp
index 1eb4f182c80e4..948c3b8cf759e 100644
--- a/sycl/test/regression/unnamed-lambda.cpp
+++ b/sycl/test/regression/unnamed-lambda.cpp
@@ -1,6 +1,6 @@
 // RUN: %clangxx -fsycl -fsyntax-only %s
 
-#include "sycl.hpp"
+#include <sycl/sycl.hpp>
 
 // This validates that the unnamed lambda logic in the library correctly works
 // with a new implementation of __builtin_unique_stable_name, where
diff --git a/sycl/test/warnings/sycl_2020_deprecations.cpp b/sycl/test/warnings/sycl_2020_deprecations.cpp
index aa0b4b3553ec4..c3f7d8a3450d3 100644
--- a/sycl/test/warnings/sycl_2020_deprecations.cpp
+++ b/sycl/test/warnings/sycl_2020_deprecations.cpp
@@ -1,6 +1,6 @@
 // RUN: %clangxx %fsycl-host-only -fsyntax-only -ferror-limit=0 -sycl-std=2020 -Xclang -verify -Xclang -verify-ignore-unexpected=note %s
 
-// expected-warning@sycl/CL/sycl.hpp:* {{CL/sycl.hpp is deprecated, use sycl/sycl.hpp}}
+// expected-warning@CL/sycl.hpp:* {{CL/sycl.hpp is deprecated, use sycl/sycl.hpp}}
 #include <CL/sycl.hpp>
 #include <sycl/ext/intel/experimental/online_compiler.hpp>