diff --git a/lib/attrsets.nix b/lib/attrsets.nix
index 686e125f100c..539eeb7b1721 100644
--- a/lib/attrsets.nix
+++ b/lib/attrsets.nix
@@ -455,7 +455,7 @@ rec {
   getDev = getOutput "dev";
 
   /* Pick the outputs of packages to place in buildInputs */
-  chooseDevOutputs = drvs: builtins.map (drv: if drv.outputUnspecified or false then drv.dev or drv else drv) drvs;
+  chooseDevOutputs = drvs: builtins.map getDev drvs;
 
   /*** deprecated stuff ***/