1 files changed, 3 insertions, 2 deletions
diff --git a/rakelib/doc.rake b/rakelib/doc.rake
index 54f5d35..7838871 100644
--- a/rakelib/doc.rake
+++ b/rakelib/doc.rake
@@ -19,8 +19,9 @@ rule '.bbl' => '.bcf' do |t|
 end
 
 namespace :doc do
-  task :tex do
-    sh 'pdflatex', '-output-directory', '../build/doc', 'report', chdir: 'doc'
+  task tex: 'build/doc' do |t|
+    sh 'pdflatex', '-output-directory', "../#{t.prerequisites.first}", 'report',
+      chdir: 'doc'
   end
 end