diff --git a/CMakeLists.txt b/CMakeLists.txt
index fda9e01bb..58e30e0bd 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -121,114 +121,114 @@ add_library(leveldb "")
 target_sources(leveldb
   PRIVATE
     "${PROJECT_BINARY_DIR}/${LEVELDB_PORT_CONFIG_DIR}/port_config.h"
-    "db/builder.cc"
-    "db/builder.h"
-    "db/c.cc"
-    "db/db_impl.cc"
-    "db/db_impl.h"
-    "db/db_iter.cc"
-    "db/db_iter.h"
-    "db/dbformat.cc"
-    "db/dbformat.h"
-    "db/dumpfile.cc"
-    "db/filename.cc"
-    "db/filename.h"
-    "db/log_format.h"
-    "db/log_reader.cc"
-    "db/log_reader.h"
-    "db/log_writer.cc"
-    "db/log_writer.h"
-    "db/memtable.cc"
-    "db/memtable.h"
-    "db/repair.cc"
-    "db/skiplist.h"
-    "db/snapshot.h"
-    "db/table_cache.cc"
-    "db/table_cache.h"
-    "db/version_edit.cc"
-    "db/version_edit.h"
-    "db/version_set.cc"
-    "db/version_set.h"
-    "db/write_batch_internal.h"
-    "db/write_batch.cc"
-    "port/port_stdcxx.h"
-    "port/port.h"
-    "port/thread_annotations.h"
-    "table/block_builder.cc"
-    "table/block_builder.h"
-    "table/block.cc"
-    "table/block.h"
-    "table/filter_block.cc"
-    "table/filter_block.h"
-    "table/format.cc"
-    "table/format.h"
-    "table/iterator_wrapper.h"
-    "table/iterator.cc"
-    "table/merger.cc"
-    "table/merger.h"
-    "table/table_builder.cc"
-    "table/table.cc"
-    "table/two_level_iterator.cc"
-    "table/two_level_iterator.h"
-    "util/arena.cc"
-    "util/arena.h"
-    "util/bloom.cc"
-    "util/cache.cc"
-    "util/coding.cc"
-    "util/coding.h"
-    "util/comparator.cc"
-    "util/crc32c.cc"
-    "util/crc32c.h"
-    "util/env.cc"
-    "util/filter_policy.cc"
-    "util/hash.cc"
-    "util/hash.h"
-    "util/logging.cc"
-    "util/logging.h"
-    "util/mutexlock.h"
-    "util/no_destructor.h"
-    "util/options.cc"
-    "util/random.h"
-    "util/status.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/db/builder.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/db/builder.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/db/c.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/db/db_impl.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/db/db_impl.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/db/db_iter.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/db/db_iter.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/db/dbformat.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/db/dbformat.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/db/dumpfile.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/db/filename.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/db/filename.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/db/log_format.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/db/log_reader.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/db/log_reader.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/db/log_writer.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/db/log_writer.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/db/memtable.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/db/memtable.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/db/repair.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/db/skiplist.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/db/snapshot.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/db/table_cache.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/db/table_cache.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/db/version_edit.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/db/version_edit.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/db/version_set.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/db/version_set.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/db/write_batch_internal.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/db/write_batch.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/port/port_stdcxx.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/port/port.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/port/thread_annotations.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/table/block_builder.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/table/block_builder.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/table/block.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/table/block.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/table/filter_block.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/table/filter_block.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/table/format.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/table/format.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/table/iterator_wrapper.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/table/iterator.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/table/merger.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/table/merger.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/table/table_builder.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/table/table.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/table/two_level_iterator.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/table/two_level_iterator.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/util/arena.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/util/arena.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/util/bloom.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/util/cache.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/util/coding.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/util/coding.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/util/comparator.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/util/crc32c.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/util/crc32c.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/util/env.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/util/filter_policy.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/util/hash.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/util/hash.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/util/logging.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/util/logging.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/util/mutexlock.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/util/no_destructor.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/util/options.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/util/random.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/util/status.cc"
 
   # Only CMake 3.3+ supports PUBLIC sources in targets exported by "install".
   $<$<VERSION_GREATER:CMAKE_VERSION,3.2>:PUBLIC>
-    "${LEVELDB_PUBLIC_INCLUDE_DIR}/c.h"
-    "${LEVELDB_PUBLIC_INCLUDE_DIR}/cache.h"
-    "${LEVELDB_PUBLIC_INCLUDE_DIR}/comparator.h"
-    "${LEVELDB_PUBLIC_INCLUDE_DIR}/db.h"
-    "${LEVELDB_PUBLIC_INCLUDE_DIR}/dumpfile.h"
-    "${LEVELDB_PUBLIC_INCLUDE_DIR}/env.h"
-    "${LEVELDB_PUBLIC_INCLUDE_DIR}/export.h"
-    "${LEVELDB_PUBLIC_INCLUDE_DIR}/filter_policy.h"
-    "${LEVELDB_PUBLIC_INCLUDE_DIR}/iterator.h"
-    "${LEVELDB_PUBLIC_INCLUDE_DIR}/options.h"
-    "${LEVELDB_PUBLIC_INCLUDE_DIR}/slice.h"
-    "${LEVELDB_PUBLIC_INCLUDE_DIR}/status.h"
-    "${LEVELDB_PUBLIC_INCLUDE_DIR}/table_builder.h"
-    "${LEVELDB_PUBLIC_INCLUDE_DIR}/table.h"
-    "${LEVELDB_PUBLIC_INCLUDE_DIR}/write_batch.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/${LEVELDB_PUBLIC_INCLUDE_DIR}/c.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/${LEVELDB_PUBLIC_INCLUDE_DIR}/cache.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/${LEVELDB_PUBLIC_INCLUDE_DIR}/comparator.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/${LEVELDB_PUBLIC_INCLUDE_DIR}/db.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/${LEVELDB_PUBLIC_INCLUDE_DIR}/dumpfile.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/${LEVELDB_PUBLIC_INCLUDE_DIR}/env.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/${LEVELDB_PUBLIC_INCLUDE_DIR}/export.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/${LEVELDB_PUBLIC_INCLUDE_DIR}/filter_policy.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/${LEVELDB_PUBLIC_INCLUDE_DIR}/iterator.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/${LEVELDB_PUBLIC_INCLUDE_DIR}/options.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/${LEVELDB_PUBLIC_INCLUDE_DIR}/slice.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/${LEVELDB_PUBLIC_INCLUDE_DIR}/status.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/${LEVELDB_PUBLIC_INCLUDE_DIR}/table_builder.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/${LEVELDB_PUBLIC_INCLUDE_DIR}/table.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/${LEVELDB_PUBLIC_INCLUDE_DIR}/write_batch.h"
 )
 
 if (WIN32)
   target_sources(leveldb
     PRIVATE
-      "util/env_windows.cc"
-      "util/windows_logger.h"
+      "${CMAKE_CURRENT_SOURCE_DIR}/util/env_windows.cc"
+      "${CMAKE_CURRENT_SOURCE_DIR}/util/windows_logger.h"
   )
 else (WIN32)
   target_sources(leveldb
     PRIVATE
-      "util/env_posix.cc"
-      "util/posix_logger.h"
+      "${CMAKE_CURRENT_SOURCE_DIR}/util/env_posix.cc"
+      "${CMAKE_CURRENT_SOURCE_DIR}/util/posix_logger.h"
   )
 endif (WIN32)
 
 # MemEnv is not part of the interface and could be pulled to a separate library.
 target_sources(leveldb
   PRIVATE
-    "helpers/memenv/memenv.cc"
-    "helpers/memenv/memenv.h"
+    "${CMAKE_CURRENT_SOURCE_DIR}/helpers/memenv/memenv.cc"
+    "${CMAKE_CURRENT_SOURCE_DIR}/helpers/memenv/memenv.h"
 )
 
 target_include_directories(leveldb
@@ -319,35 +319,35 @@ if(LEVELDB_BUILD_TESTS)
       # "issues/issue320_test.cc"
       "${PROJECT_BINARY_DIR}/${LEVELDB_PORT_CONFIG_DIR}/port_config.h"
       # "util/env_test.cc"
-      "util/status_test.cc"
-      "util/no_destructor_test.cc"
-      "util/testutil.cc"
-      "util/testutil.h"
+      "${CMAKE_CURRENT_SOURCE_DIR}/util/status_test.cc"
+      "${CMAKE_CURRENT_SOURCE_DIR}/util/no_destructor_test.cc"
+      "${CMAKE_CURRENT_SOURCE_DIR}/util/testutil.cc"
+      "${CMAKE_CURRENT_SOURCE_DIR}/util/testutil.h"
   )
   if(NOT BUILD_SHARED_LIBS)
     target_sources(leveldb_tests
       PRIVATE
-        "db/autocompact_test.cc"
-        "db/corruption_test.cc"
-        "db/db_test.cc"
-        "db/dbformat_test.cc"
-        "db/filename_test.cc"
-        "db/log_test.cc"
-        "db/recovery_test.cc"
-        "db/skiplist_test.cc"
-        "db/version_edit_test.cc"
-        "db/version_set_test.cc"
-        "db/write_batch_test.cc"
-        "helpers/memenv/memenv_test.cc"
-        "table/filter_block_test.cc"
-        "table/table_test.cc"
-        "util/arena_test.cc"
-        "util/bloom_test.cc"
-        "util/cache_test.cc"
-        "util/coding_test.cc"
-        "util/crc32c_test.cc"
-        "util/hash_test.cc"
-        "util/logging_test.cc"
+        "${CMAKE_CURRENT_SOURCE_DIR}/db/autocompact_test.cc"
+        "${CMAKE_CURRENT_SOURCE_DIR}/db/corruption_test.cc"
+        "${CMAKE_CURRENT_SOURCE_DIR}/db/db_test.cc"
+        "${CMAKE_CURRENT_SOURCE_DIR}/db/dbformat_test.cc"
+        "${CMAKE_CURRENT_SOURCE_DIR}/db/filename_test.cc"
+        "${CMAKE_CURRENT_SOURCE_DIR}/db/log_test.cc"
+        "${CMAKE_CURRENT_SOURCE_DIR}/db/recovery_test.cc"
+        "${CMAKE_CURRENT_SOURCE_DIR}/db/skiplist_test.cc"
+        "${CMAKE_CURRENT_SOURCE_DIR}/db/version_edit_test.cc"
+        "${CMAKE_CURRENT_SOURCE_DIR}/db/version_set_test.cc"
+        "${CMAKE_CURRENT_SOURCE_DIR}/db/write_batch_test.cc"
+        "${CMAKE_CURRENT_SOURCE_DIR}/helpers/memenv/memenv_test.cc"
+        "${CMAKE_CURRENT_SOURCE_DIR}/table/filter_block_test.cc"
+        "${CMAKE_CURRENT_SOURCE_DIR}/table/table_test.cc"
+        "${CMAKE_CURRENT_SOURCE_DIR}/util/arena_test.cc"
+        "${CMAKE_CURRENT_SOURCE_DIR}/util/bloom_test.cc"
+        "${CMAKE_CURRENT_SOURCE_DIR}/util/cache_test.cc"
+        "${CMAKE_CURRENT_SOURCE_DIR}/util/coding_test.cc"
+        "${CMAKE_CURRENT_SOURCE_DIR}/util/crc32c_test.cc"
+        "${CMAKE_CURRENT_SOURCE_DIR}/util/hash_test.cc"
+        "${CMAKE_CURRENT_SOURCE_DIR}/util/logging_test.cc"
     )
   endif(NOT BUILD_SHARED_LIBS)
   target_link_libraries(leveldb_tests leveldb gmock gtest gtest_main)
@@ -371,8 +371,8 @@ if(LEVELDB_BUILD_TESTS)
     target_sources("${test_target_name}"
       PRIVATE
         "${PROJECT_BINARY_DIR}/${LEVELDB_PORT_CONFIG_DIR}/port_config.h"
-        "util/testutil.cc"
-        "util/testutil.h"
+        "${CMAKE_CURRENT_SOURCE_DIR}/util/testutil.cc"
+        "${CMAKE_CURRENT_SOURCE_DIR}/util/testutil.h"
 
         "${test_file}"
     )
@@ -417,10 +417,10 @@ if(LEVELDB_BUILD_BENCHMARKS)
     target_sources("${bench_target_name}"
       PRIVATE
         "${PROJECT_BINARY_DIR}/${LEVELDB_PORT_CONFIG_DIR}/port_config.h"
-        "util/histogram.cc"
-        "util/histogram.h"
-        "util/testutil.cc"
-        "util/testutil.h"
+        "${CMAKE_CURRENT_SOURCE_DIR}/util/histogram.cc"
+        "${CMAKE_CURRENT_SOURCE_DIR}/util/histogram.h"
+        "${CMAKE_CURRENT_SOURCE_DIR}/util/testutil.cc"
+        "${CMAKE_CURRENT_SOURCE_DIR}/util/testutil.h"
 
         "${bench_file}"
     )