diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1d46315..0737d7f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -57,10 +57,10 @@ set(IONC_FULL_VERSION ${CMAKE_PROJECT_VERSION})
 find_program(GIT_EXECUTABLE "git")
 add_custom_target(
    version
-   ${CMAKE_COMMAND} -D SRC=${CMAKE_SOURCE_DIR}/build_version.h.in
-                    -D DST=${CMAKE_BINARY_DIR}/build_version.h
+   ${CMAKE_COMMAND} -D SRC=${CMAKE_CURRENT_SOURCE_DIR}/build_version.h.in
+                    -D DST=${CMAKE_CURRENT_BINARY_DIR}/build_version.h
                     -D GIT_EXECUTABLE=${GIT_EXECUTABLE}
-                    -P ${CMAKE_SOURCE_DIR}/cmake/VersionHeader.cmake
+                    -P ${CMAKE_CURRENT_SOURCE_DIR}/cmake/VersionHeader.cmake
 )
 
 include(GNUInstallDirs)
diff --git a/cmake/VersionHeader.cmake b/cmake/VersionHeader.cmake
index 95a0adc..2bdcd36 100644
--- a/cmake/VersionHeader.cmake
+++ b/cmake/VersionHeader.cmake
@@ -5,6 +5,7 @@ if (GIT_EXECUTABLE)
       OUTPUT_VARIABLE GIT_DESCRIBE_OUTPUT
       RESULT_VARIABLE GIT_DESCRIBE_ERROR
       OUTPUT_STRIP_TRAILING_WHITESPACE
+      WORKING_DIRECTORY ${CMAKE_CURRENT_LIST_DIR}
    )
    if (NOT GIT_DESCRIBE_ERROR)
       # Describe output will be in the form v<version>-<commits>-g<hash>[-dirty]
diff --git a/ionc/CMakeLists.txt b/ionc/CMakeLists.txt
index 84661b4..be80b31 100644
--- a/ionc/CMakeLists.txt
+++ b/ionc/CMakeLists.txt
@@ -67,8 +67,7 @@ target_include_directories(objlib
             $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/../decNumber/include>
         PRIVATE
             ${CMAKE_CURRENT_SOURCE_DIR}
-            ${CMAKE_BINARY_DIR}
-
+            ${CMAKE_CURRENT_BINARY_DIR}/../
 )
 
 add_dependencies(objlib version)