diff --git a/pkgs/development/compilers/sbcl/default.nix b/pkgs/development/compilers/sbcl/default.nix
index f52393961665..86c0ddd52fab 100644
--- a/pkgs/development/compilers/sbcl/default.nix
+++ b/pkgs/development/compilers/sbcl/default.nix
@@ -159,17 +159,17 @@ stdenv.mkDerivation (self: {
     export HOME=$PWD/test-home
   '';
 
-  enableFeatures = with lib;
-    assert assertMsg (self.markRegionGC -> self.threadSupport) "SBCL mark region GC requires thread support";
-    optional self.threadSupport "sb-thread" ++
-    optional self.linkableRuntime "sb-linkable-runtime" ++
-    optional self.coreCompression "sb-core-compression" ++
-    optional stdenv.isAarch32 "arm" ++
-    optional self.markRegionGC "mark-region-gc";
+  enableFeatures =
+    assert lib.assertMsg (self.markRegionGC -> self.threadSupport) "SBCL mark region GC requires thread support";
+    lib.optional self.threadSupport "sb-thread" ++
+    lib.optional self.linkableRuntime "sb-linkable-runtime" ++
+    lib.optional self.coreCompression "sb-core-compression" ++
+    lib.optional stdenv.isAarch32 "arm" ++
+    lib.optional self.markRegionGC "mark-region-gc";
 
-  disableFeatures = with lib;
-    optional (!self.threadSupport) "sb-thread" ++
-    optionals self.disableImmobileSpace [ "immobile-space" "immobile-code" "compact-instance-header" ];
+  disableFeatures =
+    lib.optional (!self.threadSupport) "sb-thread" ++
+    lib.optionals self.disableImmobileSpace [ "immobile-space" "immobile-code" "compact-instance-header" ];
 
   buildArgs = [
     "--prefix=$out"