diff --git a/src/Makefile b/src/Makefile
index 845d822ad..af2e5ee25 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -99,7 +99,6 @@ SOLDFLAGS_Linux:=-shared -fPIC -pthread
 CC_Linux=gcc
 CXX_Linux=g++
 INCS_Linux=
-FS_LIB_Linux=-lstdc++fs
 PTHREAD_LIB_Linux:=-lpthread
 BOOST_INC_Linux:=
 GRPC_INC_Linux:=$(shell pkg-config --cflags-only-I grpc++)
diff --git a/src/machine-c-api.cpp b/src/machine-c-api.cpp
index 60db702ac..e8ee48be7 100644
--- a/src/machine-c-api.cpp
+++ b/src/machine-c-api.cpp
@@ -18,7 +18,6 @@
 #include <any>
 #include <cstring>
 #include <exception>
-#include <filesystem>
 #include <future>
 #include <ios>
 #include <optional>
@@ -84,8 +83,6 @@ int cm_result_failure(char **err_msg) try { throw; } catch (std::exception &e) {
         return CM_ERROR_REGEX_ERROR;
     } catch (std::ios_base::failure &ex) {
         return CM_ERROR_SYSTEM_IOS_BASE_FAILURE;
-    } catch (std::filesystem::filesystem_error &ex) {
-        return CM_ERROR_FILESYSTEM_ERROR;
     } catch (std::runtime_error &ex) {
         return CM_ERROR_RUNTIME_ERROR;
     } catch (std::bad_typeid &ex) {
diff --git a/src/machine.cpp b/src/machine.cpp
index a1d811446..bf0fa4ea3 100644
--- a/src/machine.cpp
+++ b/src/machine.cpp
@@ -19,7 +19,6 @@
 #include <cinttypes>
 #include <cstdio>
 #include <cstring>
-#include <filesystem>
 #include <future>
 #include <iomanip>
 #include <iostream>
@@ -367,13 +366,19 @@ machine::machine(const machine_config &c, const machine_runtime_config &r) :
         const std::string flash_description = "flash drive "s + std::to_string(i++);
         // Auto detect flash drive image length
         if (f.length == UINT64_C(-1)) {
-            std::error_code ec;
-            f.length = std::filesystem::file_size(f.image_filename, ec);
-            if (ec) {
-                throw std::system_error{ec.value(), ec.category(),
+            auto fp = unique_fopen(f.image_filename.c_str(), "rb");
+            if (fseek(fp.get(), 0, SEEK_END) != 0) {
+                throw std::system_error{errno, std::generic_category(),
                     "unable to obtain length of image file '"s + f.image_filename + "' when initializing "s +
                         flash_description};
             }
+            const auto length = ftell(fp.get());
+            if (length < 0) {
+                throw std::system_error{errno, std::generic_category(),
+                    "unable to obtain length of image file '"s + f.image_filename + "' when initializing "s +
+                        flash_description};
+            }
+            f.length = length;
         }
         register_pma_entry(make_flash_drive_pma_entry(flash_description, f));
     }