diff --git a/evolution-ews.spec b/evolution-ews.spec
index c7121b0..59f1498 100644
--- a/evolution-ews.spec
+++ b/evolution-ews.spec
@@ -16,10 +16,22 @@ Requires: evolution >= %{version}
 Requires: evolution-data-server >= %{version}
 Requires: libmspack >= %{libmspack_version}
 
-BuildRequires: evolution-devel >= %{version}
-BuildRequires: evolution-data-server-devel >= %{version}
 BuildRequires: intltool
-BuildRequires: libmspack-devel >= %{libmspack_version}
+BuildRequires: pkgconfig(camel-1.2) >= %{version}
+BuildRequires: pkgconfig(evolution-data-server-1.2) >= %{version}
+BuildRequires: pkgconfig(evolution-mail-3.0) >= %{version}
+BuildRequires: pkgconfig(evolution-shell-3.0) >= %{version}
+BuildRequires: pkgconfig(glib-2.0)
+BuildRequires: pkgconfig(gtk+-3.0)
+BuildRequires: pkgconfig(libebackend-1.2) >= %{version}
+BuildRequires: pkgconfig(libebook-1.2) >= %{version}
+BuildRequires: pkgconfig(libecal-1.2) >= %{version}
+BuildRequires: pkgconfig(libedata-book-1.2) >= %{version}
+BuildRequires: pkgconfig(libedata-cal-1.2) >= %{version}
+BuildRequires: pkgconfig(libemail-engine) >= %{version}
+BuildRequires: pkgconfig(libical)
+BuildRequires: pkgconfig(libmspack) >= %{libmspack_version}
+BuildRequires: pkgconfig(libsoup-2.4)
 
 %description
 This package allows Evolution to interact with Microsoft Exchange servers,