Run nixpkgs-fmt .

https://github.com/nix-community/nixpkgs-fmt

ci.nix

@@ -9,12 +9,10 @@
 # then your CI will be able to build and cache only those packages for
 # which this is possible.
 
-{ pkgs ? import <nixpkgs> {} }:
+{ pkgs ? import <nixpkgs> { } }:
 
 with builtins;
-
 let
-
   isReserved = n: n == "lib" || n == "overlays" || n == "modules";
   isDerivation = p: isAttrs p && p ? type && p.type == "derivation";
   isBuildable = p: !(p.meta.broken or false) && p.meta.license.free or true;
@@ -29,10 +27,10 @@ let
     let
       f = p:
         if shouldRecurseForDerivations p then flattenPkgs p
-        else if isDerivation p then [p]
-        else [];
+        else if isDerivation p then [ p ]
+        else [ ];
     in
-      concatMap f (attrValues s);
+    concatMap f (attrValues s);
 
   outputsOf = p: map (o: p.${o}) p.outputs;
 
@@ -40,13 +38,12 @@ let
 
   nurPkgs =
     flattenPkgs
-    (listToAttrs
-    (map (n: nameValuePair n nurAttrs.${n})
-    (filter (n: !isReserved n)
-    (attrNames nurAttrs))));
+      (listToAttrs
+        (map (n: nameValuePair n nurAttrs.${n})
+          (filter (n: !isReserved n)
+            (attrNames nurAttrs))));
 
 in
-
 rec {
   buildPkgs = filter isBuildable nurPkgs;
   cachePkgs = filter isCacheable buildPkgs;