diff --git a/.gitignore b/.gitignore
index 140b583..a4848d2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 rake-compiler-0.7.0.gem
 rake-compiler-0.7.1.gem
+/rake-compiler-0.7.5.gem
diff --git a/rubygem-rake-compiler.spec b/rubygem-rake-compiler.spec
index a721617..bb84ddc 100644
--- a/rubygem-rake-compiler.spec
+++ b/rubygem-rake-compiler.spec
@@ -6,7 +6,7 @@
 
 Summary:	Rake-based Ruby C Extension task generator
 Name:		rubygem-%{gemname}
-Version:	0.7.1
+Version:	0.7.5
 Release:	1%{?dist}
 Group:		Development/Languages
 License:	MIT
@@ -15,6 +15,7 @@ Source0:	http://gems.rubyforge.org/gems/%{gemname}-%{version}.gem
 
 BuildRequires:	ruby(abi) = %{rubyabi}
 BuildRequires:	ruby(rubygems) >= 1.3.5
+BuildRequires:	rubygem(isolate)
 BuildRequires:	rubygem(rake)
 Requires:	ruby(abi) = %{rubyabi}
 Requires:	ruby(rubygems) >= 1.3.5
@@ -76,30 +77,51 @@ rmdir %{buildroot}%{gemdir}/bin
 
 %check
 pushd .%{geminstdir}
+
+# Modify Isolate file
+cp -p Isolate{,.orig}
+sed -i -e 's|gem |# gem|' Isolate
+
 rake spec
 
+# back to the original
+mv -f Isolate{.orig,}
+
 %clean
 rm -rf %{buildroot}
 
 %files
 %defattr(-,root,root,-)
 %{_bindir}/rake-compiler
+
 %dir %{geminstdir}
 %doc %{geminstdir}/README.rdoc
 %doc %{geminstdir}/LICENSE.txt
 %doc %{geminstdir}/History.txt
-%{geminstdir}/Rakefile
 %{geminstdir}/cucumber.yml
-%{geminstdir}/[a-z]*/
+
+%{geminstdir}/bin/
+%{geminstdir}/features/
+%{geminstdir}/lib/
+%{geminstdir}/tasks/
+
 %{gemdir}/cache/%{gemname}-%{version}.gem
 %{gemdir}/specifications/%{gemname}-%{version}.gemspec
 
 %files doc
 %defattr(-,root,root,-)
 %{gemdir}/doc/%{gemname}-%{version}
+%{geminstdir}/Isolate
+%{geminstdir}/Rakefile
+%{geminstdir}/spec/
 
 
 %changelog
+* Tue Nov 30 2010 Mamoru Tasaka <mtasaka@ioa.s.u-tokyo.ac.jp> - 0.7.5-1
+- 0.7.5
+- Move more files to -doc
+- Now needs rubygem(isolate) for BR
+
 * Wed Aug 11 2010 Mamoru Tasaka <mtasaka@ioa.s.u-tokyo.ac.jp> - 0.7.1-1
 - 0.7.1
 
diff --git a/sources b/sources
index 768b11f..03a1844 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-0a82ac13904c3d64784cc97fecd7ffa9  rake-compiler-0.7.1.gem
+ebbae09d4f32fbdd3b6f116c4d254de8  rake-compiler-0.7.5.gem