diff --git a/rubygem-ruby-shadow.spec b/rubygem-ruby-shadow.spec
index 27a3ac3..bb7008f 100644
--- a/rubygem-ruby-shadow.spec
+++ b/rubygem-ruby-shadow.spec
@@ -35,9 +35,7 @@ BuildArch:      noarch
 Documentation for %{name}.
 
 %prep
-gem unpack %{SOURCE0}
-%setup -q -D -T -n  %{gem_name}-%{version}
-gem spec %{SOURCE0} -l --ruby > %{gem_name}.gemspec
+%setup -q  -n  %{gem_name}-%{version}
 %patch1 -p1
 %patch2 -p1
 %patch0 -p1
@@ -45,7 +43,7 @@ cp %{SOURCE1} .
 
 %build
 export CONFIGURE_ARGS="--with-cflags='%{optflags} -Werror=implicit-function-declaration'"
-gem build %{gem_name}.gemspec
+gem build ../%{gem_name}-%{version}.gemspec
 
 # %%gem_install compiles any C extensions and installs the gem into ./%%gem_dir
 # by default, so that we can move it into the buildroot in %%install