diff --git a/pkgs/by-name/ea/eaglemode/package.nix b/pkgs/by-name/ea/eaglemode/package.nix
index 3d4955b87d94..ac7fd0dd7215 100644
--- a/pkgs/by-name/ea/eaglemode/package.nix
+++ b/pkgs/by-name/ea/eaglemode/package.nix
@@ -43,7 +43,8 @@ stdenv.mkDerivation (finalAttrs: {
 
   # Fixes "Error: No time zones found." on the clock
   postPatch = ''
-    substituteInPlace src/emClock/emTimeZonesModel.cpp --replace "/usr/share/zoneinfo" "${tzdata}/share/zoneinfo"
+    substituteInPlace src/emClock/emTimeZonesModel.cpp \
+      --replace-fail "/usr/share/zoneinfo" "${tzdata}/share/zoneinfo"
   '';
 
   nativeBuildInputs = [