--- lib/callable/src/perl/Main.cc.orig	2022-01-14 03:46:51.000000000 -0700

+++ lib/callable/src/perl/Main.cc	2022-03-05 21:24:12.840080722 -0700

@@ -110,6 +110,8 @@ void deduce_install_dirs(std::string lib

 {

    const char stem_name[]="libpolymake";

    constexpr size_t stem_size=sizeof(stem_name)-1;

+   if (lib_path.rfind("/lib", 0) == 0)

+      lib_path = "/usr" + lib_path;

    auto basename_start=lib_path.rfind(stem_name);

    if (basename_start == std::string::npos)

       throw std::runtime_error("polymake::Main - weird callable library path " + lib_path);