diff --git a/ghc-HUnit.spec b/ghc-HUnit.spec
index 5e8ecda..da27391 100644
--- a/ghc-HUnit.spec
+++ b/ghc-HUnit.spec
@@ -5,6 +5,7 @@
 %global pkgver %{pkg_name}-%{version}
 
 %global callstack call-stack-0.1.0
+%global subpkgs %{callstack}
 
 %bcond_with tests
 
@@ -47,7 +48,7 @@ This package provides the Haskell %{pkg_name} library development files.
 %global main_version %{version}
 
 %if %{defined ghclibdir}
-%ghc_lib_subpackage %{callstack}
+%ghc_lib_subpackage %{subpkgs}
 %endif
 
 %global version %{main_version}
@@ -58,13 +59,14 @@ This package provides the Haskell %{pkg_name} library development files.
 
 
 %build
-%ghc_libs_build %{callstack}
+%ghc_libs_build %{subpkgs}
 %ghc_lib_build
 
 
 %install
-%ghc_libs_install %{callstack}
+%ghc_libs_install %{subpkgs}
 %ghc_lib_install
+%ghc_fix_rpath %{subpkgs}
 
 
 %check