--- a/bindings/perl/CMakeLists.txt	2025-01-23 10:23:52.000000000 +0100
+++ b/bindings/perl/CMakeLists.txt	2026-10-16 23:34:24.999544118 +0200
@@ -20,17 +20,21 @@ EXECUTE_PROCESS(COMMAND ${PERL_EXECUTABL
 MESSAGE(STATUS "Perl executable: ${PERL_EXECUTABLE}")
 MESSAGE(STATUS "Perl core dir: ${PERL_CORE_DIR}")
 MESSAGE(STATUS "Perl include dir: ${PERL_INCLUDE_PATH}")
+IF(NOT PERL_INSTALL_ARCH_DIR)
 IF(PERL_VENDORARCH)
   SET(PERL_INSTALL_ARCH_DIR ${PERL_VENDORARCH})
 ELSE(PERL_VENDORARCH)
   SET(PERL_INSTALL_ARCH_DIR ${PERL_SITEARCH})
 ENDIF(PERL_VENDORARCH)
+ENDIF(NOT PERL_INSTALL_ARCH_DIR)
 
+IF(NOT PERL_INSTALL_LIB_DIR)
 IF(PERL_VENDORLIB)
   SET(PERL_INSTALL_LIB_DIR ${PERL_VENDORLIB})
 ELSE(PERL_VENDORLIB)
   SET(PERL_INSTALL_LIB_DIR ${PERL_SITELIB})
 ENDIF(PERL_VENDORLIB)
+ENDIF(NOT PERL_INSTALL_LIB_DIR)
 
 
 MESSAGE(STATUS "Perl install arch dir: ${PERL_INSTALL_ARCH_DIR}")
--- a/bindings/python/CMakeLists.txt	2025-01-23 10:23:52.000000000 +0100
+++ b/bindings/python/CMakeLists.txt	2026-10-16 23:34:24.996678134 +0200
@@ -48,7 +48,9 @@ execute_process(
   OUTPUT_VARIABLE PYTHON_SITE
   OUTPUT_STRIP_TRAILING_WHITESPACE)            
 
-SET(PYTHON_INSTALL_DIR "${PYTHON_SITE}/site-packages")
+IF(NOT PYTHON_INSTALL_DIR)
+  SET(PYTHON_INSTALL_DIR "${PYTHON_SITE}/site-packages")
+ENDIF(NOT PYTHON_INSTALL_DIR)
 
 MESSAGE(STATUS "Python executable: ${PYTHON_EXECUTABLE}")
 MESSAGE(STATUS "Python lib dir: ${PYTHON_LIB_DIR}")