diff --git a/litex/build/efinix/programmer.py b/litex/build/efinix/programmer.py
index 1981b5fa3..10a3eaff4 100644
--- a/litex/build/efinix/programmer.py
+++ b/litex/build/efinix/programmer.py
@@ -6,6 +6,7 @@
 
 import os
 import sys
+import subprocess
 
 from litex.build.generic_programmer import GenericProgrammer
 
@@ -21,7 +22,11 @@ class EfinixProgrammer(GenericProgrammer):
 
     def load_bitstream(self, bitstream_file, cable_suffix=""):
         os.environ['EFXPGM_HOME'] = self.efinity_path + '/pgm'
-        self.call([self.efinity_path + '/bin/python3', self.efinity_path +
-                   'pgm/bin/efx_pgm/ftdi_program.py', bitstream_file,
-                   "-m", "jtag"
-        ])
+        if (subprocess.call([self.efinity_path + '/bin/python3', self.efinity_path +
+                   '/pgm/bin/efx_pgm/ftdi_program.py', bitstream_file,
+                   "-m", "jtag"], env=os.environ.copy()) != 0):
+            msg = f"Error occured during {self.__class__.__name__}'s call, please check:\n"
+            msg += f"- {self.__class__.__name__} installation.\n"
+            msg += f"- access permissions.\n"
+            msg += f"- hardware and cable."
+            raise OSError(msg)