diff --git a/src/config/imp.rs b/src/config/imp.rs
index d020b87..ab96e71 100644
--- a/src/config/imp.rs
+++ b/src/config/imp.rs
@@ -7,6 +7,7 @@
 use crate::package::{Package, PackageOutput, PackageSource};
 use crate::target::TargetMap;
 use serde_derive::Deserialize;
+use serde_derive::Serialize;
 use std::collections::BTreeMap;
 use std::path::Path;
 use thiserror::Error;
@@ -101,7 +102,7 @@ impl<'a> Iterator for PackageDependencyIter<'a> {
 }
 
 /// Describes the configuration for a set of packages.
-#[derive(Clone, Deserialize, Debug)]
+#[derive(Clone, Deserialize, Serialize, Debug)]
 pub struct Config {
     /// Packages to be built and installed.
     #[serde(default, rename = "package")]
@@ -139,7 +140,7 @@ impl Config {
 }
 
 /// Configuration for targets, including preset configuration.
-#[derive(Clone, Deserialize, Debug, Default)]
+#[derive(Clone, Deserialize, Serialize, Debug, Default)]
 pub struct TargetConfig {
     /// Preset configuration for targets.
     #[serde(default, rename = "preset")]
diff --git a/src/package.rs b/src/package.rs
index d62e6a2..cc624ba 100644
--- a/src/package.rs
+++ b/src/package.rs
@@ -78,7 +78,7 @@ pub struct PrebuiltBlob {
 }
 
 /// Describes the origin of an externally-built package.
-#[derive(Clone, Deserialize, Debug, PartialEq)]
+#[derive(Clone, Deserialize, Serialize, Debug, PartialEq)]
 #[serde(tag = "type", rename_all = "lowercase")]
 pub enum PackageSource {
     /// Describes a package which should be assembled locally.
@@ -149,7 +149,7 @@ impl PackageSource {
 }
 
 /// Describes the output format of the package.
-#[derive(Deserialize, Debug, Clone, PartialEq)]
+#[derive(Deserialize, Serialize, Debug, Clone, PartialEq)]
 #[serde(tag = "type", rename_all = "lowercase")]
 pub enum PackageOutput {
     /// A complete zone image, ready to be deployed to the target.
@@ -166,7 +166,7 @@ pub enum PackageOutput {
 }
 
 /// A single package.
-#[derive(Clone, Deserialize, Debug, PartialEq)]
+#[derive(Clone, Deserialize, Serialize, Debug, PartialEq)]
 pub struct Package {
     /// The name of the service name to be used on the target OS.
     pub service_name: ServiceName,
@@ -840,7 +840,7 @@ impl Package {
 }
 
 /// Describes configuration for a package which contains a Rust binary.
-#[derive(Clone, Deserialize, Debug, PartialEq)]
+#[derive(Clone, Deserialize, Serialize, Debug, PartialEq)]
 pub struct RustPackage {
     /// The name of the compiled binary to be used.
     // TODO: Could be extrapolated to "produced build artifacts", we don't
@@ -864,7 +864,7 @@ impl RustPackage {
 }
 
 /// A string which can be modified with key-value pairs.
-#[derive(Clone, Deserialize, Debug, PartialEq)]
+#[derive(Clone, Deserialize, Serialize, Debug, PartialEq)]
 pub struct InterpolatedString(String);
 
 impl InterpolatedString {
@@ -903,7 +903,7 @@ impl InterpolatedString {
 ///
 /// These paths may require target-specific interpretation before being
 /// transformed to an actual [MappedPath].
-#[derive(Clone, Deserialize, Debug, PartialEq)]
+#[derive(Clone, Deserialize, Serialize, Debug, PartialEq)]
 pub struct InterpolatedMappedPath {
     /// Source path.
     pub from: InterpolatedString,
diff --git a/src/target.rs b/src/target.rs
index 4b19c32..67ccda0 100644
--- a/src/target.rs
+++ b/src/target.rs
@@ -4,6 +4,7 @@
 
 use crate::package::Package;
 use serde::Deserialize;
+use serde::Serialize;
 use std::collections::BTreeMap;
 
 /// Describes what platform and configuration we're trying to deploy on.
@@ -11,7 +12,7 @@ use std::collections::BTreeMap;
 /// For flexibility, this is an arbitrary key-value map without any attached
 /// semantics to particular keys. Those semantics are provided by the consumers
 /// of this tooling within omicron.
-#[derive(Clone, Debug, Default, PartialEq, Deserialize)]
+#[derive(Clone, Debug, Default, PartialEq, Deserialize, Serialize)]
 #[serde(transparent)]
 pub struct TargetMap(pub BTreeMap<String, String>);