diff --git a/config.nims b/config.nims
deleted file mode 100644
index 1e7c616..0000000
--- a/config.nims
+++ /dev/null
@@ -1,4 +0,0 @@
-if defined(windows) and not defined(vcc):
-  # Avoid some rare stack corruption while using exceptions with a SEH-enabled
-  # toolchain: https://github.com/status-im/nimbus-eth2/issues/3121
-  switch("define", "nimRawSetjmp")
diff --git a/nim.cfg b/nim.cfg
new file mode 100644
index 0000000..371f6d7
--- /dev/null
+++ b/nim.cfg
@@ -0,0 +1,5 @@
+# Avoid some rare stack corruption while using exceptions with a SEH-enabled
+# toolchain: https://github.com/status-im/nimbus-eth2/issues/3121
+@if windows and not vcc:
+  --define:nimRawSetjmp
+@end
diff --git a/tests/config.nims b/tests/config.nims
deleted file mode 100644
index 1e7c616..0000000
--- a/tests/config.nims
+++ /dev/null
@@ -1,4 +0,0 @@
-if defined(windows) and not defined(vcc):
-  # Avoid some rare stack corruption while using exceptions with a SEH-enabled
-  # toolchain: https://github.com/status-im/nimbus-eth2/issues/3121
-  switch("define", "nimRawSetjmp")
diff --git a/tests/nim.cfg b/tests/nim.cfg
index 619bfaf..74421a5 100644
--- a/tests/nim.cfg
+++ b/tests/nim.cfg
@@ -1,4 +1,10 @@
 vcc.exe = "cl.exe"
 vcc.cpp.exe = "cl.exe"
 vcc.linkerexe = "cl.exe"
-vcc.cpp.linkerexe = "cl.exe"
\ No newline at end of file
+vcc.cpp.linkerexe = "cl.exe"
+
+# Avoid some rare stack corruption while using exceptions with a SEH-enabled
+# toolchain: https://github.com/status-im/nimbus-eth2/issues/3121
+@if windows and not vcc:
+  --define:nimRawSetjmp
+@end