temp

.github/workflows/main.yml

@@ -58,7 +58,6 @@ jobs:
         run: |
           # There can be several Python versions installed. We must use the exact one discovered by CMake.
           PYTHON=`grep -m1 'Python3_EXECUTABLE.*=' build/CMakeCache.txt | cut -d= -f2`
-          PYTHONPATH=$PYTHONPATH:$PREFIX/$($PYTHON -c "import sysconfig as sc; print(sc.get_path('platlib', 'posix_prefix', vars={'platbase': '.'}))")
           $PYTHON tests/pyhook_smoketest.py
       - name: Build AppImage
         if: matrix.target == 'Release'

.github/workflows/scripts/setup_linux_deps.sh

@@ -20,7 +20,21 @@ echo "DEPSPREFIX=$DEPSPREFIX" >> $GITHUB_ENV
 echo "PATH=$PATH:$DEPSPREFIX/bin:$PREFIX/bin:~/.local/bin" >> $GITHUB_ENV
 echo "LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$DEPSPREFIX/lib:$PREFIX/lib" >> $GITHUB_ENV
 echo "PKG_CONFIG_PATH=$PKG_CONFIG_PATH:$DEPSPREFIX/lib/pkgconfig" >> $GITHUB_ENV
-echo "PYTHONPATH=$PYTHONPATH:$PREFIX/$($PYTHON -c "import sysconfig as sc; print(sc.get_path('platlib', vars={'platbase': '.'}))")" >> $GITHUB_ENV
+PYCODE="
+import sysconfig as sc
+p = sc.get_path('platlib', vars={'platbase': '.'})
+# sc.get_default_scheme() does no exist in Python < 3.10
+scheme = getattr(sc, 'get_default_scheme', lambda: None)()
+# strip leading 'local/' from 'platlib' in 'posix_local' to avoid '/usr/local/local/...' (#5840)
+if (
+    scheme == 'posix_local' and
+    '$DESTDIR$PREFIX' != sc.get_config_var('platbase') and
+    p.startswith('local/')
+):
+    p = p[6:]
+print(p)
+"
+echo "PYTHONPATH=$PYTHONPATH:$PREFIX/$($PYTHON -c "$PYCODE")" >> $GITHUB_ENV
 
 if [ ! -d deps/install ]; then
     echo "Custom dependencies not present - will build them"

Packaging/win/ffbuild.sh

@@ -491,6 +491,7 @@ log_status "Stripping Python cache files (*.pyc,*.pyo,__pycache__)..."
 find "$RELEASE/lib/$PYVER" -regextype sed -regex ".*\.py[co]" | xargs rm -rfv
 find "$RELEASE/lib/$PYVER" -name "__pycache__" | xargs rm -rfv
 
+# no need to check for 'posix_local' scheme because we are on MSYS2
 PY_DLLS_SRC_PATH=`/$MINGVER/bin/python.exe -c "import sysconfig as sc; print(sc.get_path('platlib', vars={'platbase': '.'}))"`
 
 log_status "Copying the Python extension dlls..."

pyhook/CMakeLists.txt

@@ -36,10 +36,25 @@ else()
   # So do it ourselves, getting the prefix-relative path instead
   if(NOT DEFINED PYHOOK_INSTALL_DIR)
     if(APPLE)
-      set(_PYHOOK_SYSCONFIG_PREFIX " 'posix_prefix',")
+      set(_pycode "import sysconfig as sc; print(sc.get_path('platlib','posix_prefix', vars={'platbase': '.'}))")
+    else()
+      set(_pycode "
+import sysconfig as sc
+p = sc.get_path('platlib', vars={'platbase': '.'})
+# sc.get_default_scheme() does no exist in Python < 3.10
+scheme = getattr(sc, 'get_default_scheme', lambda: None)()
+# strip leading 'local/' from 'platlib' in 'posix_local' to avoid '/usr/local/local/...' (#5840)
+if (
+  scheme == 'posix_local' and
+  \"$ENV{DESTDIR}${CMAKE_INSTALL_PREFIX}\" != sc.get_config_var('platbase') and
+  p.startswith('local/')
+):
+  p = p[6:]
+print(p)
+")
     endif()
     execute_process(
-      COMMAND "${Python3_EXECUTABLE}" -c "import sysconfig as sc; print(sc.get_path('platlib',${_PYHOOK_SYSCONFIG_PREFIX} vars={'platbase': '.'}))"
+      COMMAND "${Python3_EXECUTABLE}" -c "${_pycode}"
       RESULT_VARIABLE _pyhook_install_dir_result
       OUTPUT_VARIABLE PYHOOK_INSTALL_DIR
       OUTPUT_STRIP_TRAILING_WHITESPACE)