diff --git a/nix/overlays/hix-project.nix b/nix/overlays/hix-project.nix
index 2e77484..a2ffd22 100644
--- a/nix/overlays/hix-project.nix
+++ b/nix/overlays/hix-project.nix
@@ -14,6 +14,7 @@ final: prev: {
         packages.unix.components.library.configureFlags = [''-f os-string''];
         packages.directory.components.library.configureFlags = [''-f os-string''];
         packages.file-io.components.library.configureFlags = [''-f os-string''];
+        packages.process.components.library.configureFlags = [''-f os-string''];
 
         packages.cpp-notebook-language-server.components.exes.cpp-notebook-language-server.dontStrip = false;
       } (