4 files changed, 4 insertions, 4 deletions
diff --git a/nixos/modules/programs/bash/bash.nix b/nixos/modules/programs/bash/bash.nix
index 27b5f9e4b642..a7e57b8608d7 100644
--- a/nixos/modules/programs/bash/bash.nix
+++ b/nixos/modules/programs/bash/bash.nix
@@ -34,7 +34,7 @@ let
 
   bashAliases = concatStringsSep "\n" (
     mapAttrsFlatten (k: v: "alias ${k}=${escapeShellArg v}")
-      (filterAttrs (k: v: !isNull v) cfg.shellAliases)
+      (filterAttrs (k: v: v != null) cfg.shellAliases)
   );
 
 in
diff --git a/nixos/modules/programs/fish.nix b/nixos/modules/programs/fish.nix
index 622d2f96fe41..87f6816e4ac0 100644
--- a/nixos/modules/programs/fish.nix
+++ b/nixos/modules/programs/fish.nix
@@ -10,7 +10,7 @@ let
 
   fishAliases = concatStringsSep "\n" (
     mapAttrsFlatten (k: v: "alias ${k} ${escapeShellArg v}")
-      (filterAttrs (k: v: !isNull v) cfg.shellAliases)
+      (filterAttrs (k: v: v != null) cfg.shellAliases)
   );
 
 in
diff --git a/nixos/modules/programs/ssmtp.nix b/nixos/modules/programs/ssmtp.nix
index 44756171b74c..0e060e3f5226 100644
--- a/nixos/modules/programs/ssmtp.nix
+++ b/nixos/modules/programs/ssmtp.nix
@@ -148,7 +148,7 @@ in
         UseSTARTTLS=${yesNo cfg.useSTARTTLS}
         #Debug=YES
         ${optionalString (cfg.authUser != "")       "AuthUser=${cfg.authUser}"}
-        ${optionalString (!isNull cfg.authPassFile) "AuthPassFile=${cfg.authPassFile}"}
+        ${optionalString (cfg.authPassFile != null) "AuthPassFile=${cfg.authPassFile}"}
       '';
 
     environment.systemPackages = [pkgs.ssmtp];
diff --git a/nixos/modules/programs/zsh/zsh.nix b/nixos/modules/programs/zsh/zsh.nix
index b7117e5f90d7..bdb37eae23ef 100644
--- a/nixos/modules/programs/zsh/zsh.nix
+++ b/nixos/modules/programs/zsh/zsh.nix
@@ -12,7 +12,7 @@ let
 
   zshAliases = concatStringsSep "\n" (
     mapAttrsFlatten (k: v: "alias ${k}=${escapeShellArg v}")
-      (filterAttrs (k: v: !isNull v) cfg.shellAliases)
+      (filterAttrs (k: v: v != null) cfg.shellAliases)
   );
 
 in