diff --git a/build/ruby-filemagic/0.7.2 b/build/ruby-filemagic/0.7.2
index e69de29..4143691 100644
--- a/build/ruby-filemagic/0.7.2
+++ b/build/ruby-filemagic/0.7.2
@@ -0,0 +1 @@
+EXTRA_PKGS="file-dev"
diff --git a/build/ruby-filemagic/0.7.3 b/build/ruby-filemagic/0.7.3
index e69de29..4143691 100644
--- a/build/ruby-filemagic/0.7.3
+++ b/build/ruby-filemagic/0.7.3
@@ -0,0 +1 @@
+EXTRA_PKGS="file-dev"