diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index cdeae4d..1085cf9 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,13 +15,13 @@ jobs:
       run: brew install ccache
 
     - name: Configure
-      run: cmake -Htest -Bbuild -DUSE_CCACHE=YES
+      run: cmake -Htest -Bbuild -DUSE_CCACHE=YES -DCCACHE_OPTIONS="CCACHE_CPP2=true;CCACHE_SLOPPINESS=clang_index_store"
 
     - name: Build
       run: "cmake --build build"
 
     - name: Configure for XCode
-      run: cmake -Htest -Bbuildx -GXcode -DUSE_CCACHE=YES
+      run: cmake -Htest -Bbuildx -GXcode -DUSE_CCACHE=YES -DCCACHE_OPTIONS="CCACHE_CPP2=true;CCACHE_SLOPPINESS=clang_index_store"
 
     - name: Build for XCode
       run: "cmake --build buildx"
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3797328..627cf8e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,38 +3,46 @@
 cmake_minimum_required(VERSION 3.4)
 
 option(USE_CCACHE "" OFF)
+set(CCACHE_OPTIONS "" CACHE STRING "options for ccache")
 
 if (USE_CCACHE)
 
-  find_program(CCACHE_PROGRAM ccache)
-
-  if(CCACHE_PROGRAM)
-      # Set up wrapper scripts
-      set(C_LAUNCHER   "${CCACHE_PROGRAM}")
-      set(CXX_LAUNCHER "${CCACHE_PROGRAM}")
-      configure_file(launch-c.in   launch-c)
-      configure_file(launch-cxx.in launch-cxx)
-      execute_process(COMMAND chmod a+rx
-                      "${CMAKE_CURRENT_BINARY_DIR}/launch-c"
-                      "${CMAKE_CURRENT_BINARY_DIR}/launch-cxx"
-      )
-
-      if(CMAKE_GENERATOR STREQUAL "Xcode")
-          # Set Xcode project attributes to route compilation and linking
-          # through our scripts
-          set(CMAKE_XCODE_ATTRIBUTE_CC         "${CMAKE_CURRENT_BINARY_DIR}/launch-c" CACHE INTERNAL "")
-          set(CMAKE_XCODE_ATTRIBUTE_CXX        "${CMAKE_CURRENT_BINARY_DIR}/launch-cxx" CACHE INTERNAL "")
-          set(CMAKE_XCODE_ATTRIBUTE_LD         "${CMAKE_CURRENT_BINARY_DIR}/launch-c" CACHE INTERNAL "")
-          set(CMAKE_XCODE_ATTRIBUTE_LDPLUSPLUS "${CMAKE_CURRENT_BINARY_DIR}/launch-cxx" CACHE INTERNAL "")
-      else()
-          # Support Unix Makefiles and Ninja
-          set(CMAKE_C_COMPILER_LAUNCHER   "${CMAKE_CURRENT_BINARY_DIR}/launch-c" CACHE INTERNAL "")
-          set(CMAKE_CXX_COMPILER_LAUNCHER "${CMAKE_CURRENT_BINARY_DIR}/launch-cxx" CACHE INTERNAL "")
-      endif()
-
-      message(STATUS "Using ccache: ${CCACHE_PROGRAM}")
-  else()
-      message(WARNING "Could not enable Ccache: could not find program")
-  endif()
+    find_program(CCACHE_PROGRAM ccache)
+
+    if(CCACHE_PROGRAM)
+        # Set up wrapper scripts
+        set(C_LAUNCHER   "${CCACHE_PROGRAM}")
+        set(CXX_LAUNCHER "${CCACHE_PROGRAM}")
+        set(CCCACHE_EXPORTS "")
+
+        foreach(option ${CCACHE_OPTIONS})
+            set(CCCACHE_EXPORTS "${CCCACHE_EXPORTS}\nexport ${option}")
+        endforeach()
+
+        configure_file(launch-c.in   launch-c)
+        configure_file(launch-cxx.in launch-cxx)
+
+        execute_process(COMMAND chmod a+rx
+                        "${CMAKE_CURRENT_BINARY_DIR}/launch-c"
+                        "${CMAKE_CURRENT_BINARY_DIR}/launch-cxx"
+        )
+
+        if(CMAKE_GENERATOR STREQUAL "Xcode")
+            # Set Xcode project attributes to route compilation and linking
+            # through our scripts
+            set(CMAKE_XCODE_ATTRIBUTE_CC         "${CMAKE_CURRENT_BINARY_DIR}/launch-c" CACHE INTERNAL "")
+            set(CMAKE_XCODE_ATTRIBUTE_CXX        "${CMAKE_CURRENT_BINARY_DIR}/launch-cxx" CACHE INTERNAL "")
+            set(CMAKE_XCODE_ATTRIBUTE_LD         "${CMAKE_CURRENT_BINARY_DIR}/launch-c" CACHE INTERNAL "")
+            set(CMAKE_XCODE_ATTRIBUTE_LDPLUSPLUS "${CMAKE_CURRENT_BINARY_DIR}/launch-cxx" CACHE INTERNAL "")
+        else()
+            # Support Unix Makefiles and Ninja
+            set(CMAKE_C_COMPILER_LAUNCHER   "${CMAKE_CURRENT_BINARY_DIR}/launch-c" CACHE INTERNAL "")
+            set(CMAKE_CXX_COMPILER_LAUNCHER "${CMAKE_CURRENT_BINARY_DIR}/launch-cxx" CACHE INTERNAL "")
+        endif()
+
+        message(STATUS "Using ccache: ${CCACHE_PROGRAM}")
+    else()
+        message(WARNING "Could not enable Ccache: could not find program")
+    endif()
 
 endif()
diff --git a/README.md b/README.md
index 7e4004d..3e81c1b 100644
--- a/README.md
+++ b/README.md
@@ -8,11 +8,12 @@ A simple, Xcode compatible _Ccache_ integration for _CMake_, based on [this](htt
 
 [Ccache](https://ccache.dev) is a compiler cache that can drastically improve build times for C and C++ projects.
 This script makes it easy to configure a CMake project to use Ccache by adding the configuration option `USE_CCACHE` which will active Ccache support when enabled.
+Build-specific environmental variables can be set with the `CCACHE_OPTIONS` configuration parameter.
 It is currently compatible with _Makefile_, _Ninja_ and _Xcode_ generators.
 Example usage:
 
 ```bash
-cmake . -DUSE_CCACHE=YES
+cmake . -DUSE_CCACHE=YES -DCCACHE_OPTIONS="CCACHE_CPP2=true;CCACHE_SLOPPINESS=clang_index_store"
 ```
 
 ## How to integrate
diff --git a/launch-c.in b/launch-c.in
index 7107bc9..68b8c10 100644
--- a/launch-c.in
+++ b/launch-c.in
@@ -6,5 +6,6 @@ if [[ "$1" = "${CMAKE_C_COMPILER}" ]] ; then
     shift
 fi
 
-export CCACHE_CPP2=true
+${CCCACHE_EXPORTS}
+
 exec "${C_LAUNCHER}" "${CMAKE_C_COMPILER}" "$@"
\ No newline at end of file
diff --git a/launch-cxx.in b/launch-cxx.in
index 457660f..1c1381c 100644
--- a/launch-cxx.in
+++ b/launch-cxx.in
@@ -6,5 +6,6 @@ if [[ "$1" = "${CMAKE_CXX_COMPILER}" ]] ; then
     shift
 fi
 
-export CCACHE_CPP2=true
+${CCCACHE_EXPORTS}
+
 exec "${CXX_LAUNCHER}" "${CMAKE_CXX_COMPILER}" "$@"