diff --git a/docs/default.nix b/docs/default.nix
index 21f00fb4..dd79c459 100644
--- a/docs/default.nix
+++ b/docs/default.nix
@@ -147,7 +147,7 @@ in {
       substitute \
         ${hmOptionsDocs.optionsJSON}/nix-support/hydra-build-products \
         $out/nix-support/hydra-build-products \
-        --replace \
+        --replace-fail \
           '${hmOptionsDocs.optionsJSON}/share/doc/nixos' \
           "$out/share/doc/home-manager"
     '';
diff --git a/modules/programs/alacritty.nix b/modules/programs/alacritty.nix
index e799e269..6fa7fb6e 100644
--- a/modules/programs/alacritty.nix
+++ b/modules/programs/alacritty.nix
@@ -56,7 +56,7 @@ in {
           buildCommand = lib.concatStringsSep "\n" [
             prevAttrs.buildCommand
             # TODO: why is this needed? Is there a better way to retain escape sequences?
-            "substituteInPlace $out --replace '\\\\' '\\'"
+            "substituteInPlace $out --replace-quiet '\\\\' '\\'"
           ];
         });
     };