use Ruby 1.8 as this program does not work with Ruby 1.9 at all

flvtool/flvtool.spec

@@ -41,8 +41,8 @@ Source1:      flvtool.1
 #   build information
 Prefix:       %{l_prefix}
 BuildRoot:    %{l_buildroot}
-BuildPreReq:  OpenPKG, openpkg >= 20060823, ruby
-PreReq:       OpenPKG, openpkg >= 20060823, ruby
+BuildPreReq:  OpenPKG, openpkg >= 20060823, ruby18
+PreReq:       OpenPKG, openpkg >= 20060823, ruby18
 AutoReq:      no
 AutoReqProv:  no
 
@@ -63,17 +63,17 @@ AutoReqProv:  no
     %setup -q -n flvtool2-%{version}
 
 %build
-    ruby setup.rb config \
+    ruby18 setup.rb config \
         --prefix=%{l_prefix}
 
 %install
     rm -rf $RPM_BUILD_ROOT
-    ruby setup.rb install \
+    ruby18 setup.rb install \
         --prefix=$RPM_BUILD_ROOT
     mv  $RPM_BUILD_ROOT%{l_prefix}/bin/flvtool2 \
         $RPM_BUILD_ROOT%{l_prefix}/bin/flvtool
     %{l_shtool} subst \
-        -e 's;#! /usr/bin/env ruby;#!%{l_prefix}/bin/ruby;' \
+        -e 's;#! /usr/bin/env ruby;#!%{l_prefix}/bin/ruby18;' \
         $RPM_BUILD_ROOT%{l_prefix}/bin/flvtool
     %{l_shtool} mkdir -f -p -m 755 \
         $RPM_BUILD_ROOT%{l_prefix}/man/man1