Fixing dependencies, they go in the rakefile not the gemspec.

Gemfile.lock

@@ -1,11 +1,10 @@
 PATH
   remote: .
   specs:
-    yogo-db (0.2.0)
+    yogo-db (0.4.0)
       activesupport
       carrierwave
       data_mapper (~> 1.0.2)
-      dm-is-remixable
       dm-postgres-adapter
       dm-sqlite-adapter
       json
@@ -166,14 +165,9 @@ GEM
     yard (0.6.1)
     yardstick (0.1.0)
       yard (~> 0.2)
-    yogo-datamapper (0.3.0)
-      dm-aggregates (~> 1.0.2)
-      dm-core (~> 1.0.2)
+    yogo-datamapper (0.5.0)
+      data_mapper (~> 1.0.2)
       dm-is-remixable
-      dm-migrations
-      dm-timestamps
-      dm-types (~> 1.0.2)
-      dm-validations
       yogo-operation
       yogo-support
     yogo-operation (0.1.2)
@@ -190,7 +184,6 @@ DEPENDENCIES
   carrierwave
   cucumber
   data_mapper (~> 1.0.2)
-  dm-is-remixable
   dm-postgres-adapter
   dm-sqlite-adapter
   factory_girl

Rakefile

@@ -14,16 +14,16 @@ Jeweler::Tasks.new do |gem|
   gem.email = %q{[email protected]}
   gem.homepage = %q{http://github.com/yogo/yogo-db}
   gem.summary = %q{Yogo DB Rest components}
-  gem.add_dependency(   %q<sinatra>             )
-  gem.add_dependency(   %q<rack>                )
-  gem.add_dependency(   %q<activesupport>       )
-  gem.add_dependency(   %q<data_mapper>         )
-  gem.add_dependency(   %q<dm-sqlite-adapter>   )
-  gem.add_dependency(   %q<dm-postgres-adapter> )
-  # gem.add_dependency(   %q<yogo-operation>      )
-  # gem.add_dependency(   %q<yogo-datamapper>     )
-  gem.add_dependency(   %q<json>                )
-  gem.add_dependency(   %q<carrierwave>         )
+  gem.add_dependency(%q<sinatra>             )
+  gem.add_dependency(%q<rack>                )
+  gem.add_dependency(%q<activesupport>       )
+  gem.add_dependency(%q<data_mapper>          , "~> 1.0.2")
+  gem.add_dependency(%q<dm-sqlite-adapter>   )
+  gem.add_dependency(%q<dm-postgres-adapter> )
+  gem.add_dependency(%q<yogo-operation>      )
+  gem.add_dependency(%q<yogo-datamapper>     )
+  gem.add_dependency(%q<json>                )
+  gem.add_dependency(%q<carrierwave>         )
 end
 
 begin

yogo-db.gemspec

@@ -9,7 +9,7 @@ Gem::Specification.new do |s|
 
   s.required_rubygems_version = Gem::Requirement.new(">= 0") if s.respond_to? :required_rubygems_version=
   s.authors = ["Ryan Heimbuch"]
-  s.date = %q{2010-10-19}
+  s.date = %q{2010-11-01}
   s.description = %q{Restful interface to yogo data components}
   s.email = %q{[email protected]}
   s.extra_rdoc_files = [
@@ -74,28 +74,34 @@ Gem::Specification.new do |s|
       s.add_runtime_dependency(%q<sinatra>, [">= 0"])
       s.add_runtime_dependency(%q<rack>, [">= 0"])
       s.add_runtime_dependency(%q<activesupport>, [">= 0"])
-      s.add_runtime_dependency(%q<data_mapper>, [">= 0"])
+      s.add_runtime_dependency(%q<data_mapper>, ["~> 1.0.2"])
       s.add_runtime_dependency(%q<dm-sqlite-adapter>, [">= 0"])
       s.add_runtime_dependency(%q<dm-postgres-adapter>, [">= 0"])
+      s.add_runtime_dependency(%q<yogo-operation>, [">= 0"])
+      s.add_runtime_dependency(%q<yogo-datamapper>, [">= 0"])
       s.add_runtime_dependency(%q<json>, [">= 0"])
       s.add_runtime_dependency(%q<carrierwave>, [">= 0"])
     else
       s.add_dependency(%q<sinatra>, [">= 0"])
       s.add_dependency(%q<rack>, [">= 0"])
       s.add_dependency(%q<activesupport>, [">= 0"])
-      s.add_dependency(%q<data_mapper>, [">= 0"])
+      s.add_dependency(%q<data_mapper>, ["~> 1.0.2"])
       s.add_dependency(%q<dm-sqlite-adapter>, [">= 0"])
       s.add_dependency(%q<dm-postgres-adapter>, [">= 0"])
+      s.add_dependency(%q<yogo-operation>, [">= 0"])
+      s.add_dependency(%q<yogo-datamapper>, [">= 0"])
       s.add_dependency(%q<json>, [">= 0"])
       s.add_dependency(%q<carrierwave>, [">= 0"])
     end
   else
     s.add_dependency(%q<sinatra>, [">= 0"])
     s.add_dependency(%q<rack>, [">= 0"])
     s.add_dependency(%q<activesupport>, [">= 0"])
-    s.add_dependency(%q<data_mapper>, [">= 0"])
+    s.add_dependency(%q<data_mapper>, ["~> 1.0.2"])
     s.add_dependency(%q<dm-sqlite-adapter>, [">= 0"])
     s.add_dependency(%q<dm-postgres-adapter>, [">= 0"])
+    s.add_dependency(%q<yogo-operation>, [">= 0"])
+    s.add_dependency(%q<yogo-datamapper>, [">= 0"])
     s.add_dependency(%q<json>, [">= 0"])
     s.add_dependency(%q<carrierwave>, [">= 0"])
   end