diff --git a/example/FakePkg/Project.toml b/example/FakePkg/Project.toml
index 7c7aba5..e589c42 100644
--- a/example/FakePkg/Project.toml
+++ b/example/FakePkg/Project.toml
@@ -8,3 +8,12 @@ Comonicon = "863f3e99-da2a-4334-8734-de3dacbe5542"
 FromFile = "ff7dd447-1dcb-4ce3-b8ac-22a812192de7"
 PkgTemplates = "14b8a8f1-9102-5b29-a752-f990bacb7fe1"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
+
+[weakdeps]
+DelimitedFiles = "8bb1440f-4735-579b-a4ab-409b98df4dab"
+
+[compat]
+DelimitedFiles = "1"
+
+[extras]
+DelimitedFiles = "8bb1440f-4735-579b-a4ab-409b98df4dab"
diff --git a/src/builder/sysimg.jl b/src/builder/sysimg.jl
index 79caf46..f8bd9bb 100644
--- a/src/builder/sysimg.jl
+++ b/src/builder/sysimg.jl
@@ -43,6 +43,12 @@ function create_command_env(m::Module, envpath::String = mktempdir(); test_deps:
     cmd_project = Pkg.Types.Project()
     merge!(cmd_project.deps, ctx.env.project.deps)
     merge!(cmd_project.compat, ctx.env.project.compat)
+    if hasproperty(ctx.env.project, :extras)
+        merge!(cmd_project.extras, ctx.env.project.extras)
+    end
+    if hasproperty(ctx.env.project, :weakdeps)
+        merge!(cmd_project.weakdeps, ctx.env.project.weakdeps)
+    end
     # add the package to dependencies
     cmd_project.deps[ctx.env.project.name] = ctx.env.project.uuid