问Cmake似乎没有使用它确认使用的Python解释器

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cmake_minimum_required(VERSION 3.2 FATAL_ERROR)
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/../cmake/")

project(aConfigd VERSION 1.0)
string(TOLOWER aConfigd project_id)

find_package(PythonInterp 3.4 REQUIRED)

include(FindPythonInterp)
set(PYTHON ${PYTHON_EXECUTABLE})
message(STATUS "\${PYTHON_EXECUTABLE} == ${PYTHON_EXECUTABLE}")
set(pkgdatadir /usr/share/configd)
set(configdir /etc/amy)
set(SONARCONFIGID_SOURCE_DIR etc/configd)
set(SRC_DIR configd/src/)

include(common)
#        "${SRC_DIR}/systemd_client.py"
#        "${SRC_DIR}/amyconfig_service.py"
        "${SRC_DIR}/__init__.py"
        "${SRC_DIR}/main.py"
        "${SRC_DIR}/application.py"
        DESTINATION ${pkgdatadir}/configd/
)

#general
set(CPACK_PACKAGE_NAME "a-config")
set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "a-config-manager")
set(CPACK_PACKAGE_DESCRIPTION "a-config-manager")

# redhat
set(CPACK_RPM_EXCLUDE_FROM_AUTO_FILELIST_ADDITION 
      /etc/amy
      )

include(cpack)

$ make clean ; cmake -DCMAKE_BUILD_TYPE=Release -DSHORT_VERSION=NO -DCUSTOMER=NO .. ;  make -j12 ; make package
-- Found PythonInterp: /usr/bin/python3.4 (found suitable version "3.4.5", minimum required is "3.4") 
-- Found PythonInterp: /usr/bin/python3.4 (found version "3.4.5") 
-- ${PYTHON_EXECUTABLE} == /usr/bin/python3.4
-- Build Type: Release
-- Detected distribution: rhel fedora
-- Detected aConfigd version: 2.3.0-3030-gf7733cf659
-- Detected distribution: rhel fedora
-- Configuring done
-- Generating done
-- Build files have been written to: /local/raid0/git/amy/aConfig/build
Run CPack packaging tool...
CPack: Create package using RPM
CPack: Install projects
CPack: - Run preinstall target for: aConfigd
CPack: - Install project: aConfigd
CPack: Create package
CPackRPM:Warning: CPACK_SET_DESTDIR is set (=ON) while requesting a relocatable package (CPACK_RPM_PACKAGE_RELOCATABLE is set): this is not supported, the package won't be relocatable.
CPackRPM: Will use GENERATED spec file: /local/raid0/git/my/aConfig/build/_CPack_Packages/Linux/RPM/SPECS/a-config.spec
CPack: - package: /local/raid0/git/my/aConfig/build/a-config-2.3.0-3030-gf7733cf659.el7.my.x86_64.rpm generated.
$ 

Compiling /local/raid0/git/my/aConfig/build/_CPack_Packages/Linux/RPM/a-config-2.3.0-3030-gf7733cf659.el7.my.x86_64/usr/share/configd/configd/systemd_client.py ...
  File "/usr/share/configd/configd/systemd_client.py", line 21
    def __init__(self, systemd_proxy:Gio.DBusProxy):
                                    ^
SyntaxError: invalid syntax