diff --git a/litex/build/altera/platform.py b/litex/build/altera/platform.py
index f7b3b0a8ef..fe14303362 100644
--- a/litex/build/altera/platform.py
+++ b/litex/build/altera/platform.py
@@ -18,6 +18,7 @@ class AlteraPlatform(GenericPlatform):
         "flash" : ".rbf"
     }
     create_rbf    = True
+    create_svf    = True
 
     _supported_toolchains = ["quartus"]
 
diff --git a/litex/build/altera/quartus.py b/litex/build/altera/quartus.py
index 5be426c293..ef6b505b0c 100644
--- a/litex/build/altera/quartus.py
+++ b/litex/build/altera/quartus.py
@@ -192,6 +192,8 @@ def build_script(self):
 quartus_fit --read_settings_files=off --write_settings_files=off {build_name} -c {build_name}
 quartus_asm --read_settings_files=off --write_settings_files=off {build_name} -c {build_name}
 quartus_sta {build_name} -c {build_name}"""
+
+        # Create .rbf.
         if self.platform.create_rbf:
             if sys.platform in ["win32", "cygwin"]:
               script_contents += """
@@ -205,6 +207,21 @@ def build_script(self):
 then
     quartus_cpf -c {build_name}.sof {build_name}.rbf
 fi
+"""
+        # Create .svf.
+        if self.platform.create_svf:
+            if sys.platform in ["win32", "cygwin"]:
+              script_contents += """
+if exist "{build_name}.sof" (
+    quartus_cpf -c -q \"12.0MHz\" -g 3.3 -n p {build_name}.sof {build_name}.svf
+)
+"""
+            else:
+              script_contents += """
+if [ -f "{build_name}.sof" ]
+then
+    quartus_cpf -c -q \"12.0MHz\" -g 3.3 -n p {build_name}.sof {build_name}.svf
+fi
 """
         script_contents = script_contents.format(build_name=build_name, synth_tool=self._synth_tool)
         tools.write_to_file(script_file, script_contents, force_unix=True)
diff --git a/litex/build/efinix/efinity.py b/litex/build/efinix/efinity.py
index 6f81e8db82..7cc29af963 100644
--- a/litex/build/efinix/efinity.py
+++ b/litex/build/efinix/efinity.py
@@ -391,7 +391,9 @@ def run_script(self, script):
         if r != 0:
             raise OSError("Error occurred during efx_map execution.")
 
-
+        vdbfile = f"work_syn/{self._build_name}.vdb"
+        if not os.path.exists(vdbfile):
+            vdbfile = f"outflow/{self._build_name}.vdb"
 
         r = tools.subprocess_call_filtered([self.efinity_path + "/bin/efx_pnr",
             "--circuit",              f"{self._build_name}",
@@ -401,7 +403,7 @@ def run_script(self, script):
             "--pack",
             "--place",
             "--route",
-            "--vdb_file",             f"work_syn/{self._build_name}.vdb",
+            "--vdb_file",             vdbfile,
             "--use_vdb_file",         "on",
             "--place_file",           f"outflow/{self._build_name}.place",
             "--route_file",           f"outflow/{self._build_name}.route",