diff --git a/pkgs/build-support/dotnet/build-dotnet-module/default.nix b/pkgs/build-support/dotnet/build-dotnet-module/default.nix
index f8ed3a38890c..573b270ee408 100644
--- a/pkgs/build-support/dotnet/build-dotnet-module/default.nix
+++ b/pkgs/build-support/dotnet/build-dotnet-module/default.nix
@@ -165,7 +165,7 @@ stdenvNoCC.mkDerivation (args // {
     components = lib.pipe args.version [
       lib.splitVersion
       (lib.filter (x: (lib.strings.match "[0-9]+" x) != null))
-      (lib.filter (x: (lib.toInt x) < 65535)) # one version component in dotnet has to fit in 16 bits
+      (lib.filter (x: (lib.toIntBase10 x) < 65535)) # one version component in dotnet has to fit in 16 bits
     ];
   in if (lib.length components) == 0
   then null