diff --git a/default.nix b/default.nix
index 2db6e2c2..7dfbfc24 100644
--- a/default.nix
+++ b/default.nix
@@ -45,6 +45,7 @@ let
     installManPages = false;
     notmuch = pkgs.notmuch;
     gpgme = pkgs.gpgme;
+    pkg-config = pkgs.pkg-config;
     buildNoDefaultFeatures = !defaultFeatures;
     buildFeatures = lib.strings.splitString "," features;
   };
diff --git a/package.nix b/package.nix
index 6ad26f86..f939b149 100644
--- a/package.nix
+++ b/package.nix
@@ -1,4 +1,5 @@
 { lib
+, pkg-config
 , hostPlatform
 , rustPlatform
 , fetchFromGitHub
@@ -38,10 +39,11 @@ rustPlatform.buildRustPackage rec {
   '';
 
   nativeBuildInputs = [ ]
+    ++ lib.optional hostPlatform.isDarwin pkg-config
     ++ lib.optional (installManPages || installShellCompletions) installShellFiles;
 
   buildInputs = [ ]
-    ++ lib.optionals hostPlatform.isDarwin (with darwin.apple_sdk_11_0.frameworks; [ libiconv Security ])
+    ++ lib.optionals hostPlatform.isDarwin (with darwin.apple_sdk_11_0.frameworks; [ Security ])
     ++ lib.optional (builtins.elem "notmuch" buildFeatures) notmuch
     ++ lib.optional (builtins.elem "pgp-gpg" buildFeatures) gpgme;