diff --git a/pkgs/development/python-modules/pydexcom/default.nix b/pkgs/development/python-modules/pydexcom/default.nix
index 26ca55ddf32c..b1ecf3b6282f 100644
--- a/pkgs/development/python-modules/pydexcom/default.nix
+++ b/pkgs/development/python-modules/pydexcom/default.nix
@@ -7,7 +7,7 @@
   requests,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "pydexcom";
   version = "0.5.1";
   pyproject = true;
@@ -15,7 +15,7 @@ buildPythonPackage rec {
   src = fetchFromGitHub {
     owner = "gagebenne";
     repo = "pydexcom";
-    tag = version;
+    tag = finalAttrs.version;
     hash = "sha256-u94OI45PmofPLpuJUpjbvGLla+mJEHy1t6/4fiI6+zc=";
   };
 
@@ -34,8 +34,8 @@ buildPythonPackage rec {
   meta = {
     description = "Python API to interact with Dexcom Share service";
     homepage = "https://github.com/gagebenne/pydexcom";
-    changelog = "https://github.com/gagebenne/pydexcom/releases/tag/${src.tag}";
+    changelog = "https://github.com/gagebenne/pydexcom/releases/tag/${finalAttrs.src.tag}";
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ fab ];
   };
-}
+})