diff --git a/nix/pyproject-overrides.nix b/nix/pyproject-overrides.nix
index 2175e1b995ea..9c6d0645a0ea 100644
--- a/nix/pyproject-overrides.nix
+++ b/nix/pyproject-overrides.nix
@@ -66,8 +66,8 @@ in
       final.cython
       pkgs.proj
     ];
-    PROJ_DIR = "${lib.getDev pkgs.proj}";
-    # PROJ_INCDIR = "${lib.getDev pkgs.proj}";
+    PROJ_DIR = "${lib.getBin pkgs.proj}";
+    PROJ_INCDIR = "${lib.getDev pkgs.proj}";
   });
 
   pyogrio = prev.pyogrio.overrideAttrs (attrs: {