Developers or packagers of PKCS#11 modules need to install various files into specific locations so that p11-kit will recognize and load the module correctly. You should use pkg-config as described below to determine configuration paths. p11-kit installs a pkg-config file called p11-kit-1.pc. This file contains all the information about the various paths that p11-kit looks for files at.

As described in the module configuration documentation, each PKCS#11 module should install a config file describing that module. These config files should be installed to a specific directory which can be determined by running: $ pkg-config p11-kit-1 --variable p11_system_config_modules /etc/pkcs11/modules

If a module configuration contains a relative path in its module: setting, then that module will be loaded from the default module path. This path can be determined by running: $ pkg-config p11-kit-1 --variable p11_module_path /usr/lib64/pkcs11