diff --git a/cmake/CMakeLists.txt b/cmake/CMakeLists.txt
index e390faea..e5b5603a 100644
--- a/cmake/CMakeLists.txt
+++ b/cmake/CMakeLists.txt
@@ -35,18 +35,18 @@ function(UseGitOrCloneImpl remote use_custom_branch custom_branch)
   else()
     if(NOT use_custom_branch)
       message(STATUS "Cloning `${dep}` from `${remote}` using the default branch ...")
-      execute_process(OUTPUT_QUIET ERROR_QUIET COMMAND git clone --depth 1 ${remote})
+      execute_process(OUTPUT_QUIET ERROR_QUIET COMMAND git clone --depth 1 ${remote} WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}")
     else()
       message(STATUS "Cloning `${dep}` from `${remote}:${branch}` ...")
-      execute_process(OUTPUT_QUIET ERROR_QUIET COMMAND git clone --depth 1 -b ${custom_branch} ${remote})
+      execute_process(OUTPUT_QUIET ERROR_QUIET COMMAND git clone --depth 1 -b ${custom_branch} ${remote} WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}")
     endif()
-    add_subdirectory("${CMAKE_SOURCE_DIR}/${dep}" ${dep})
+    add_subdirectory("${CMAKE_CURRENT_SOURCE_DIR}/${dep}" ${dep})
     message(STATUS "Cloning `${dep}` from `${remote}`: Configured.")
     if("${C5T_PROJECT_ROOT}" STREQUAL "")
       file(TOUCH .gitignore)
       file(APPEND .gitignore "${dep}/\n")  # NOTE(dkorolev): This may add extra `.gitignore` lines, ignore for now.
     endif()
-    set("C5T_DEP_DIR_${dep}" "${CMAKE_SOURCE_DIR}/${dep}" CACHE INTERNAL "")
+    set("C5T_DEP_DIR_${dep}" "${CMAKE_CURRENT_SOURCE_DIR}/${dep}" CACHE INTERNAL "")
   endif()
   # If the added repository contains the `.c5t_cmake_dependency` file,
   # then add this repo's C5T library name to all targets built by this `CMakeLists.txt`.