diff --git a/nixos/modules/config/zram.nix b/nixos/modules/config/zram.nix
index b162fbc311e3..cc2ca6314433 100644
--- a/nixos/modules/config/zram.nix
+++ b/nixos/modules/config/zram.nix
@@ -73,10 +73,10 @@ in
         default = 50;
         type = types.int;
         description = lib.mdDoc ''
-          Maximum amount of memory that can be used by the zram swap devices
+          Maximum total amount of memory that can be stored in the zram swap devices
           (as a percentage of your total memory). Defaults to 1/2 of your total
-          RAM. Run `zramctl` to check how good memory is
-          compressed.
+          RAM. Run `zramctl` to check how good memory is compressed.
+          This doesn't define how much memory will be used by the zram swap devices.
         '';
       };
 
@@ -84,8 +84,9 @@ in
         default = null;
         type = with types; nullOr int;
         description = lib.mdDoc ''
-          Maximum total amount of memory (in bytes) that can be used by the zram
+          Maximum total amount of memory (in bytes) that can be stored in the zram
           swap devices.
+          This doesn't define how much memory will be used by the zram swap devices.
         '';
       };
 
diff --git a/pkgs/development/compilers/dmd/default.nix b/pkgs/development/compilers/dmd/default.nix
index 4565128f52b0..1c15e8b970b7 100644
--- a/pkgs/development/compilers/dmd/default.nix
+++ b/pkgs/development/compilers/dmd/default.nix
@@ -84,6 +84,11 @@ stdenv.mkDerivation rec {
   postPatch =
   ''
     patchShebangs .
+
+    # Disable tests that rely on objdump whitespace until fixed upstream:
+    #   https://issues.dlang.org/show_bug.cgi?id=23317
+    rm dmd/test/runnable/cdvecfill.sh
+    rm dmd/test/compilable/cdcmp.d
   ''
 
   # This one has tested against a hardcoded year, then against a current year on