3 files changed, 6 insertions, 3 deletions
diff --git a/pkgs/servers/mail/exim/default.nix b/pkgs/servers/mail/exim/default.nix
index d503a4d7b57..b4cec18d030 100644
--- a/pkgs/servers/mail/exim/default.nix
+++ b/pkgs/servers/mail/exim/default.nix
@@ -16,7 +16,8 @@ stdenv.mkDerivation rec {
     })
   ];
 
-  buildInputs = [ coreutils db openssl pcre perl pkgconfig ];
+  nativeBuildInputs = [ pkgconfig ];
+  buildInputs = [ coreutils db openssl pcre perl ];
 
   preBuild = ''
     sed '
diff --git a/pkgs/servers/mail/freepops/default.nix b/pkgs/servers/mail/freepops/default.nix
index a96e4cb37c0..b4f671862f8 100644
--- a/pkgs/servers/mail/freepops/default.nix
+++ b/pkgs/servers/mail/freepops/default.nix
@@ -6,7 +6,8 @@ stdenv.mkDerivation {
     url = mirror://sourceforge/freepops/0.2.9/freepops-0.2.9.tar.gz;
     sha256 = "3a065e30cafed03d9b6fdb28251ae5bf0d8aeb62181746154beecd25dc0c9cae";
   };
-  buildInputs = [pkgconfig openssl lua5 curl readline bison expat];
+  nativeBuildInputs = [ pkgconfig ];
+  buildInputs = [ openssl lua5 curl readline bison expat];
   configurePhase =
   ''
     export WHERE=$prefix/
diff --git a/pkgs/servers/mail/postfix/pfixtools.nix b/pkgs/servers/mail/postfix/pfixtools.nix
index a4186559e89..8c00bcdbee2 100644
--- a/pkgs/servers/mail/postfix/pfixtools.nix
+++ b/pkgs/servers/mail/postfix/pfixtools.nix
@@ -28,7 +28,8 @@ stdenv.mkDerivation {
 
   patches = [ ./0001-Fix-build-with-unbound-1.6.1.patch ];
 
-  buildInputs = [git gperf pcre unbound libev tokyocabinet pkgconfig bash libsrs2];
+  nativeBuildInputs = [ pkgconfig ];
+  buildInputs = [git gperf pcre unbound libev tokyocabinet bash libsrs2];
 
   postUnpack = ''
     cp -Rp ${libCommonSrc}/* ${srcRoot}/common;