diff --git a/alex.spec b/alex.spec
index da612de..42b1f94 100644
--- a/alex.spec
+++ b/alex.spec
@@ -32,12 +32,18 @@ Source0:        https://hackage.haskell.org/package/%{name}-%{version}/%{name}-%
 BuildRequires:  autoconf
 BuildRequires:  ghc-Cabal-devel
 BuildRequires:  ghc-array-devel
+BuildRequires:  ghc-array-prof
+BuildRequires:  ghc-base-devel
+BuildRequires:  ghc-base-prof
 BuildRequires:  ghc-containers-devel
+BuildRequires:  ghc-containers-prof
 BuildRequires:  ghc-directory-devel
+BuildRequires:  ghc-directory-prof
 BuildRequires:  ghc-rpm-macros
 ExcludeArch:    %{ix86}
 %if %{with tests}
 BuildRequires:  ghc-process-devel
+BuildRequires:  ghc-process-prof
 %endif
 
 %description