diff --git a/pkgs/applications/editors/neovim/wrapper.nix b/pkgs/applications/editors/neovim/wrapper.nix
index 17cf49521f1d..568043f96687 100644
--- a/pkgs/applications/editors/neovim/wrapper.nix
+++ b/pkgs/applications/editors/neovim/wrapper.nix
@@ -30,7 +30,7 @@ let
 
   /* for compatibility with passing extraPythonPackages as a list; added 2018-07-11 */
   compatFun = funOrList: (if builtins.isList funOrList then
-    (_: builtins.trace "passing a list as extraPythonPackages to the neovim wrapper is deprecated, pass a function as to python.withPackages instead" funOrList)
+    (_: lib.warn "passing a list as extraPythonPackages to the neovim wrapper is deprecated, pass a function as to python.withPackages instead" funOrList)
     else funOrList);
   extraPythonPackagesFun = compatFun extraPythonPackages;
   extraPython3PackagesFun = compatFun extraPython3Packages;
diff --git a/pkgs/stdenv/generic/default.nix b/pkgs/stdenv/generic/default.nix
index f5da78807106..ac727034b8e7 100644
--- a/pkgs/stdenv/generic/default.nix
+++ b/pkgs/stdenv/generic/default.nix
@@ -123,7 +123,7 @@ let
       inherit (hostPlatform)
         isDarwin isLinux isSunOS isCygwin isFreeBSD isOpenBSD
         isi686 isx86_64 is64bit isAarch32 isAarch64 isMips isBigEndian;
-      isArm = builtins.trace
+      isArm = lib.warn
         "`stdenv.isArm` is deprecated after 18.03. Please use `stdenv.isAarch32` instead"
         hostPlatform.isAarch32;