diff --git a/nexus/Cargo.toml b/nexus/Cargo.toml
index 4d55a134c1b..fb6a07969d6 100644
--- a/nexus/Cargo.toml
+++ b/nexus/Cargo.toml
@@ -51,7 +51,7 @@ num-integer.workspace = true
 once_cell.workspace = true
 openssl.workspace = true
 oximeter-client.workspace = true
-oximeter-db.workspace = true
+oximeter-db = { workspace = true, default-features = false, features = [ "oxql" ] }
 oxnet.workspace = true
 parse-display.workspace = true
 paste.workspace = true
diff --git a/oximeter/db/Cargo.toml b/oximeter/db/Cargo.toml
index 3811f45be05..253015287bc 100644
--- a/oximeter/db/Cargo.toml
+++ b/oximeter/db/Cargo.toml
@@ -19,6 +19,7 @@ clap.workspace = true
 dropshot.workspace = true
 futures.workspace = true
 highway.workspace = true
+num.workspace = true
 omicron-common.workspace = true
 omicron-workspace-hack.workspace = true
 oximeter.workspace = true
@@ -45,10 +46,6 @@ optional = true
 workspace = true
 optional = true
 
-[dependencies.num]
-workspace = true
-optional = true
-
 [dependencies.peg]
 workspace = true
 optional = true
@@ -91,6 +88,7 @@ indexmap.workspace = true
 itertools.workspace = true
 omicron-test-utils.workspace = true
 slog-dtrace.workspace = true
+sqlformat.workspace = true
 sqlparser.workspace = true
 strum.workspace = true
 tempfile.workspace = true
@@ -107,7 +105,6 @@ sql = [
 ]
 oxql = [
     "dep:crossterm",
-    "dep:num",
     "dep:peg",
     "dep:reedline",
     "dep:tabled",
diff --git a/oximeter/db/src/bin/oxdb/main.rs b/oximeter/db/src/bin/oxdb/main.rs
index 871135fb16f..32ca2acb3c8 100644
--- a/oximeter/db/src/bin/oxdb/main.rs
+++ b/oximeter/db/src/bin/oxdb/main.rs
@@ -14,7 +14,7 @@ use oximeter::{
     types::{Cumulative, Sample},
     Metric, Target,
 };
-use oximeter_db::{query, shells::make_client, Client, DbWrite};
+use oximeter_db::{make_client, query, Client, DbWrite};
 use slog::{debug, info, o, Drain, Level, Logger};
 use std::net::IpAddr;
 use uuid::Uuid;
@@ -148,6 +148,7 @@ enum Subcommand {
     },
 
     /// Enter the Oximeter Query Language shell for interactive querying.
+    #[cfg(feature = "oxql")]
     Oxql {
         #[clap(flatten)]
         opts: oximeter_db::shells::oxql::ShellOptions,
@@ -350,6 +351,7 @@ async fn main() -> anyhow::Result<()> {
             oximeter_db::shells::sql::shell(args.address, args.port, log, opts)
                 .await?
         }
+        #[cfg(feature = "oxql")]
         Subcommand::Oxql { opts } => {
             oximeter_db::shells::oxql::shell(args.address, args.port, log, opts)
                 .await?
diff --git a/oximeter/db/src/client/mod.rs b/oximeter/db/src/client/mod.rs
index 0c372cedae4..2d6212971e4 100644
--- a/oximeter/db/src/client/mod.rs
+++ b/oximeter/db/src/client/mod.rs
@@ -7,6 +7,7 @@
 // Copyright 2024 Oxide Computer Company
 
 pub(crate) mod dbwrite;
+#[cfg(any(feature = "oxql", test))]
 pub(crate) mod oxql;
 pub(crate) mod query_summary;
 #[cfg(any(feature = "sql", test))]
diff --git a/oximeter/db/src/lib.rs b/oximeter/db/src/lib.rs
index bbf29653e9c..c3d2014ad16 100644
--- a/oximeter/db/src/lib.rs
+++ b/oximeter/db/src/lib.rs
@@ -7,6 +7,7 @@
 // Copyright 2024 Oxide Computer Company
 
 use crate::query::StringFieldSelector;
+use anyhow::Context as _;
 use chrono::DateTime;
 use chrono::Utc;
 use dropshot::EmptyScanParams;
@@ -23,9 +24,11 @@ pub use oximeter::Sample;
 use schemars::JsonSchema;
 use serde::Deserialize;
 use serde::Serialize;
+use slog::Logger;
 use std::collections::BTreeMap;
 use std::convert::TryFrom;
 use std::io;
+use std::net::{IpAddr, SocketAddr};
 use std::num::NonZeroU32;
 use std::path::PathBuf;
 use thiserror::Error;
@@ -40,6 +43,7 @@ pub mod shells;
 #[cfg(any(feature = "sql", test))]
 pub mod sql;
 
+#[cfg(any(feature = "oxql", test))]
 pub use client::oxql::OxqlResult;
 pub use client::query_summary::QuerySummary;
 pub use client::Client;
@@ -142,10 +146,12 @@ pub enum Error {
     #[error("SQL error")]
     Sql(#[from] sql::Error),
 
+    #[cfg(any(feature = "oxql", test))]
     #[error(transparent)]
     Oxql(oxql::Error),
 }
 
+#[cfg(any(feature = "oxql", test))]
 impl From<crate::oxql::Error> for Error {
     fn from(e: crate::oxql::Error) -> Self {
         Error::Oxql(e)
@@ -239,6 +245,21 @@ pub struct TimeseriesPageSelector {
     pub offset: NonZeroU32,
 }
 
+/// Create a client to the timeseries database, and ensure the database exists.
+pub async fn make_client(
+    address: IpAddr,
+    port: u16,
+    log: &Logger,
+) -> Result<Client, anyhow::Error> {
+    let address = SocketAddr::new(address, port);
+    let client = Client::new(address, &log);
+    client
+        .init_single_node_db()
+        .await
+        .context("Failed to initialize timeseries database")?;
+    Ok(client)
+}
+
 pub(crate) type TimeseriesKey = u64;
 
 // TODO-cleanup: Add the timeseries version in to the computation of the key.
diff --git a/oximeter/db/src/oxql/mod.rs b/oximeter/db/src/oxql/mod.rs
index b93d75b859a..3961fae1cce 100644
--- a/oximeter/db/src/oxql/mod.rs
+++ b/oximeter/db/src/oxql/mod.rs
@@ -19,7 +19,7 @@ pub use self::table::Table;
 pub use self::table::Timeseries;
 pub use anyhow::Error;
 
-// Format a PEG parsing error into a nice anyhow error.
+/// Format a PEG parsing error into a nice anyhow error.
 fn fmt_parse_error(source: &str, err: PegError<LineCol>) -> Error {
     use std::fmt::Write;
     let mut out =
diff --git a/oximeter/db/src/query.rs b/oximeter/db/src/query.rs
index 7b622920ffb..ceabf008883 100644
--- a/oximeter/db/src/query.rs
+++ b/oximeter/db/src/query.rs
@@ -371,10 +371,12 @@ impl FieldSelector {
     }
 }
 
-/// A stringly-typed selector for finding fields by name and comparsion with a given value.
+/// A stringly-typed selector for finding fields by name and comparsion with a
+/// given value.
 ///
-/// This is used internally to parse comparisons written as strings, such as from the `oxdb`
-/// command-line tool or from another external source (Nexus API, for example).
+/// This is used internally to parse comparisons written as strings, such as
+/// from the `oxdb` command-line tool or from another external
+/// source (Nexus API, for example).
 #[derive(Debug, Clone, PartialEq, Serialize, Deserialize, JsonSchema)]
 pub struct StringFieldSelector {
     name: String,
diff --git a/oximeter/db/src/shells/mod.rs b/oximeter/db/src/shells/mod.rs
index 86ac053c80d..8f653ffcd5a 100644
--- a/oximeter/db/src/shells/mod.rs
+++ b/oximeter/db/src/shells/mod.rs
@@ -7,14 +7,9 @@
 // Copyright 2024 Oxide Computer Company
 
 use crate::Client;
-use crate::DbWrite as _;
-use anyhow::Context as _;
 use dropshot::EmptyScanParams;
 use dropshot::WhichPage;
 use oximeter::TimeseriesSchema;
-use slog::Logger;
-use std::net::IpAddr;
-use std::net::SocketAddr;
 
 #[cfg(any(feature = "oxql", test))]
 pub mod oxql;
@@ -130,21 +125,6 @@ pub async fn describe_timeseries(
     Ok(())
 }
 
-/// Create a client to the timeseries database, and ensure the database exists.
-pub async fn make_client(
-    address: IpAddr,
-    port: u16,
-    log: &Logger,
-) -> Result<Client, anyhow::Error> {
-    let address = SocketAddr::new(address, port);
-    let client = Client::new(address, &log);
-    client
-        .init_single_node_db()
-        .await
-        .context("Failed to initialize timeseries database")?;
-    Ok(client)
-}
-
 /// Prepare the columns for a timeseries or virtual table.
 pub(crate) fn prepare_columns(
     schema: &TimeseriesSchema,
diff --git a/oximeter/db/src/shells/oxql.rs b/oximeter/db/src/shells/oxql.rs
index 3e81a0f6ec1..0f23ea7d64a 100644
--- a/oximeter/db/src/shells/oxql.rs
+++ b/oximeter/db/src/shells/oxql.rs
@@ -6,8 +6,8 @@
 
 // Copyright 2024 Oxide Computer
 
-use super::{list_timeseries, make_client, prepare_columns};
-use crate::{oxql::Table, Client, OxqlResult};
+use super::{list_timeseries, prepare_columns};
+use crate::{make_client, oxql::Table, Client, OxqlResult};
 use clap::Args;
 use crossterm::style::Stylize;
 use reedline::DefaultPrompt;
diff --git a/oximeter/db/src/shells/sql.rs b/oximeter/db/src/shells/sql.rs
index 389ebd5019c..f75713da3b9 100644
--- a/oximeter/db/src/shells/sql.rs
+++ b/oximeter/db/src/shells/sql.rs
@@ -6,9 +6,9 @@
 
 // Copyright 2024 Oxide Computer Company
 
-use super::{make_client, prepare_columns};
+use super::prepare_columns;
 use crate::sql::{function_allow_list, QueryResult, Table};
-use crate::{Client, QuerySummary};
+use crate::{make_client, Client, QuerySummary};
 use clap::Args;
 use dropshot::EmptyScanParams;
 use dropshot::WhichPage;
diff --git a/oximeter/instruments/Cargo.toml b/oximeter/instruments/Cargo.toml
index d5dcac411a3..831f102c662 100644
--- a/oximeter/instruments/Cargo.toml
+++ b/oximeter/instruments/Cargo.toml
@@ -36,6 +36,7 @@ http-instruments = [
     "dep:oximeter",
     "dep:schemars",
     "dep:serde",
+    "dep:slog",
     "dep:uuid"
 ]
 kstat = [
diff --git a/sled-storage/src/manager_test_harness.rs b/sled-storage/src/manager_test_harness.rs
index 74c2967a847..44092750178 100644
--- a/sled-storage/src/manager_test_harness.rs
+++ b/sled-storage/src/manager_test_harness.rs
@@ -123,6 +123,7 @@ impl Drop for StorageManagerTestHarness {
 impl StorageManagerTestHarness {
     /// Creates a new StorageManagerTestHarness with no associated disks.
     pub async fn new(log: &Logger) -> Self {
+        #[cfg(all(test, feature = "testing"))]
         illumos_utils::USE_MOCKS.store(false, Ordering::SeqCst);
         let tmp = camino_tempfile::tempdir_in("/var/tmp")
             .expect("Failed to make temporary directory");
diff --git a/sled-storage/src/pool.rs b/sled-storage/src/pool.rs
index cc71aeb19d2..13ffe48e452 100644
--- a/sled-storage/src/pool.rs
+++ b/sled-storage/src/pool.rs
@@ -27,7 +27,7 @@ impl Pool {
     }
 
     /// Return a Pool consisting of fake info
-    #[cfg(feature = "testing")]
+    #[cfg(all(test, feature = "testing"))]
     pub fn new_with_fake_info(name: ZpoolName, parent: DiskIdentity) -> Pool {
         let info = ZpoolInfo::new_hardcoded(name.to_string());
         Pool { name, info, parent }
diff --git a/uuid-kinds/Cargo.toml b/uuid-kinds/Cargo.toml
index e39017c2bfc..9ea2f8223cc 100644
--- a/uuid-kinds/Cargo.toml
+++ b/uuid-kinds/Cargo.toml
@@ -19,6 +19,6 @@ paste.workspace = true
 [features]
 default = ["std"]
 serde = ["newtype-uuid/serde"]
-schemars08 = ["newtype-uuid/schemars08", "schemars"]
+schemars08 = ["newtype-uuid/schemars08", "schemars", "std"]
 std = ["newtype-uuid/std"]
 uuid-v4 = ["newtype-uuid/v4"]
diff --git a/uuid-kinds/src/lib.rs b/uuid-kinds/src/lib.rs
index 430b3f7f9fb..53acc9c1ede 100644
--- a/uuid-kinds/src/lib.rs
+++ b/uuid-kinds/src/lib.rs
@@ -2,12 +2,12 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this
 // file, You can obtain one at https://mozilla.org/MPL/2.0/.
 
-#![cfg_attr(not(feature = "std"), no_std)]
-
 //! A registry for UUID kinds used in Omicron and related projects.
 //!
 //! See this crate's `README.adoc` for more information.
 
+#![cfg_attr(not(feature = "std"), no_std)]
+
 // Export these types so that other users don't have to pull in newtype-uuid.
 #[doc(no_inline)]
 pub use newtype_uuid::{