diff --git a/libsbml.spec b/libsbml.spec
index 7bcdb29..bcfe5e4 100644
--- a/libsbml.spec
+++ b/libsbml.spec
@@ -47,7 +47,7 @@
 
 Name:           libsbml
 Version:        5.12.0
-Release:        4%{?dist}
+Release:        5%{?dist}
 Summary:        Systems Biology Markup Language library
 
 License:        LGPLv2+
@@ -138,6 +138,7 @@ This package contains %{summary}.
 %if %{with ruby}
 %package -n ruby-%{rubypkg}
 BuildRequires:  ruby-devel
+BuildRequires:  rubypick
 Requires:       ruby(release)
 Requires:       %{name}%{?_isa} = %{version}-%{release}
 Provides:       ruby(%{rubypkg}) = %{version}
@@ -290,6 +291,11 @@ export CXXFLAGS="$RPM_OPT_FLAGS $RPM_LD_FLAGS -Wl,-z,now"
 %endif
 %if %{with ruby}
        -DWITH_RUBY:BOOL=ON \
+       -DRUBY_SITEARCH_DIR:PATH=%{ruby_sitearchdir} \
+       -DRUBY_SITELIB_DIR:PATH=%{ruby_sitelibdir} \
+       -DRUBY_VENDORARCH_DIR:PATH=%{ruby_vendorarchdir} \
+       -DRUBY_VENDORLIB_DIR:PATH=%{ruby_vendorlibdir} \
+       -DRUBY_HAS_VENDOR_RUBY:BOOL=ON \
 %endif
 %if %{with java}
        -DWITH_JAVA:BOOL=ON \
@@ -472,6 +478,10 @@ ctest --force-new-ctest-process -V -E "test_ruby_binding"
 %endif
 
 %changelog
+* Thu Jan 21 2016 Antonio Trande <sagitterATfedoraproject.org> - 5.12.0-5
+- Defined rubypick as BuildRequires for ruby-libsbml
+- Defined Ruby paths
+
 * Tue Jan 12 2016 Vít Ondruch <vondruch@redhat.com> - 5.12.0-4
 - Rebuilt for https://fedoraproject.org/wiki/Changes/Ruby_2.3