diff --git a/setup.py b/setup.py
index cfbaa55..51b6dbb 100644
--- a/setup.py
+++ b/setup.py
@@ -108,7 +108,18 @@ def copy_extensions_to_source(self):
     def run(self):
         shared_options.load(self)
         try:
-            super().run()
+            # We need to compute the install directory here, because
+            # build_ext.run() unsets build_ext.inplace while running
+            # build_extension(). This means that files would be installed
+            # to the wrong location (to the temporary build directory)
+            # for `setup.py develop`/`pip install -e` builds.
+            self.install_dirs = {}
+            for ext in self.extensions:
+                if isinstance(ext, CMakeExtension):
+                    self.install_dirs[ext] = os.path.join(
+                        os.path.abspath(
+                            os.path.dirname(self.get_ext_fullpath(ext.name))),
+                        ext.prefix)
 
             try:
                 out = subprocess.check_output(['cmake', '--version'])
@@ -123,8 +134,7 @@ def run(self):
             if cmake_version < '3.7.0':
                 raise RuntimeError("CMake >= 3.7.0 is required.")
 
-            for ext in self.extensions:
-                self.build_extension(ext)
+            super().run()
 
         except BaseException as e:
             print(
@@ -163,13 +173,9 @@ def add_flags(self):
 
     def build_extension(self, ext):
         if isinstance(ext, CMakeExtension):
-            extdir = os.path.join(
-                os.path.abspath(
-                    os.path.dirname(self.get_ext_fullpath(ext.name))),
-                ext.prefix)
+            extdir = self.install_dirs[ext]
             cmake_args = [
-                '-DCMAKE_INSTALL_PREFIX=' + extdir,
-                '-DCMAKE_LIBRARY_OUTPUT_DIRECTORY=' + extdir,
+                '-DCMAKE_INSTALL_PREFIX=' + extdir, '-DCMAKE_INSTALL_LIBDIR=.',
                 '-DPYTHON_EXECUTABLE=' + sys.executable,
                 '-DANTLR_RUNTIME_TYPE=' + shared_options.antlr_runtime
             ]
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 94783a6..f407785 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -57,7 +57,7 @@ include_directories(${ANTLR4_INCLUDE_DIRS})
 
 # set variable pointing to the antlr tool that supports C++
 # this is not required if the jar file can be found under PATH environment
-set(ANTLR_EXECUTABLE ${CMAKE_CURRENT_SOURCE_DIR}/../third_party/antlr4_lib/antlr-4.9.3-complete.jar)
+set(ANTLR_EXECUTABLE ${CMAKE_CURRENT_SOURCE_DIR}/../third_party/antlr4_lib/antlr-4.9.3-complete.jar CACHE PATH "antlr4 generator JAR file")
 
 # add macros to generate ANTLR Cpp code from grammar
 find_package(ANTLR REQUIRED)
@@ -80,13 +80,15 @@ antlr_target(FasmParser antlr/FasmParser.g4 PARSER VISITOR
 # line 1: Skip lines starting in #define
 #      2: Extract TAGS(...) from dependencies
 #      3: Convert from TAGS('c', long_name) -> long_name = b'c, write to file
-add_custom_target(tags.py ALL
+add_custom_command(OUTPUT tags.py
   COMMAND grep -ve ^\#define ${CMAKE_CURRENT_SOURCE_DIR}/ParseFasm.cpp |
           grep -hoe TAG\([^\)]*\) |
-          sed -e s/TAG\(\\\(.*\\\),\ \\\(.*\\\)\)/\\2\ =\ b\\1/ > tags.py
+          sed -e s/TAG\(\\\(.*\\\),\ \\\(.*\\\)\)/\\2\ =\ b\\1/ > ${CMAKE_CURRENT_BINARY_DIR}/tags.py
   DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/ParseFasm.cpp
   VERBATIM
   )
+add_custom_target(tags_py ALL DEPENDS tags.py)
+install(FILES ${CMAKE_CURRENT_BINARY_DIR}/tags.py TYPE LIB)
 
 # Include generated files in project environment
 include_directories(${ANTLR_FasmLexer_OUTPUT_DIR})
@@ -97,6 +99,7 @@ add_library(parse_fasm SHARED ParseFasm.cpp
   ${ANTLR_FasmLexer_CXX_OUTPUTS}
   ${ANTLR_FasmParser_CXX_OUTPUTS})
 target_link_libraries(parse_fasm ${ANTLR4_RUNTIME})
+install(TARGETS parse_fasm)
 #target_compile_options(parse_fasm PRIVATE -Wno-attributes) # Disable warning from antlr4-runtime
 
 add_executable(parse_fasm_tests
@@ -105,6 +108,7 @@ add_executable(parse_fasm_tests
   ${ANTLR_FasmParser_CXX_OUTPUTS})
 target_link_libraries(parse_fasm_tests ${ANTLR4_RUNTIME})
 target_link_libraries(parse_fasm_tests gtest_main)
+target_link_libraries(parse_fasm_tests gtest)
 #target_compile_options(parse_fasm_tests PRIVATE -Wno-attributes) # Disable warning from antlr4-runtime
 
 # Standalone executable
@@ -122,5 +126,3 @@ include(CTest)
 add_test(NAME parse_fasm_tests
          COMMAND parse_fasm_tests)
 enable_testing()
-
-install(FILES ${CMAKE_CURRENT_BINARY_DIR}/tags.py DESTINATION .)