support.StreamDevice: reorder attributes

pkgs/epnix/support/StreamDevice/default.nix

@@ -15,6 +15,21 @@ in
     inherit version;
     varname = "STREAM";
 
+    src = fetchFromGitHub {
+      owner = "paulscherrerinstitute";
+      repo = "StreamDevice";
+      rev = version;
+      # Tarball from GitHub is not completely reproducible due to usage of
+      # export-subst in .gitattributes for .VERSION
+      # See: https://epics.anl.gov/tech-talk/2022/msg01842.php
+      forceFetchGit = true;
+      hash = "sha256-/OgjdHvFr6sBRhOLa9F3KJeaxMiKuUuBduHUc4YLYBI=";
+    };
+
+    nativeBuildInputs = [pcre];
+    buildInputs = [pcre] ++ (with epnix.support; [sscan]);
+    propagatedBuildInputs = with epnix.support; [asyn calc];
+
     inherit local_config_site;
     local_release =
       local_release
@@ -27,21 +42,6 @@ in
         STREAM = null;
       };
 
-    nativeBuildInputs = [pcre];
-    buildInputs = [pcre] ++ (with epnix.support; [sscan]);
-    propagatedBuildInputs = with epnix.support; [asyn calc];
-
-    src = fetchFromGitHub {
-      owner = "paulscherrerinstitute";
-      repo = "StreamDevice";
-      rev = version;
-      # Tarball from GitHub is not completely reproducible due to usage of
-      # export-subst in .gitattributes for .VERSION
-      # See: https://epics.anl.gov/tech-talk/2022/msg01842.php
-      forceFetchGit = true;
-      hash = "sha256-/OgjdHvFr6sBRhOLa9F3KJeaxMiKuUuBduHUc4YLYBI=";
-    };
-
     meta = {
       description = "A generic EPICS device support for devices with a \"byte stream\" based communication interface";
       homepage = "https://paulscherrerinstitute.github.io/StreamDevice/";