kmx.io/rbpkg

diff --git a/lib/rbpkg/repo.rb b/lib/rbpkg/repo.rb
index 085e9df..418771e 100644
--- a/lib/rbpkg/repo.rb
+++ b/lib/rbpkg/repo.rb
@@ -11,6 +11,8 @@ class Rbpkg::Repo
       cmd! "cd #{sh_quote(src_dir)} && #{autogen_env} ./autogen"
     elsif File.exists?("#{src_dir}/autogen.sh")
       cmd! "cd #{sh_quote(src_dir)} && #{autogen_env} sh autogen.sh"
+    elsif File.executable?("#{src_dir}/bootstrap")
+      cmd! "cd #{sh_quote(src_dir)} && #{autogen_env} ./bootstrap"
     end
   end
 
@@ -98,7 +100,7 @@ class Rbpkg::Repo
 
   def clean_configure
     verbose 3, "repo(#{name.inspect}).clean_configure"
-    tag_remove("configure-done")
+    tag_remove("configure-done") if tag_present?("configure-done")
   end
 
   def clean_fake
diff --git a/lib/rbpkg/repos/libffi.rb b/lib/rbpkg/repos/libffi.rb
index 6c11f3e..638effd 100644
--- a/lib/rbpkg/repos/libffi.rb
+++ b/lib/rbpkg/repos/libffi.rb
@@ -9,7 +9,7 @@ class Rbpkg::Repos::Libffi < Rbpkg::Repo
   end
 
   def autogen_env
-    "AUTOCONF_VERSION=2.71"
+    "AUTOCONF_VERSION=2.69"
   end
 
   def configure_env