diff --git a/.repository-projection.json b/.repository-projection.json
index 64779ef..e053310 100644
--- a/.repository-projection.json
+++ b/.repository-projection.json
@@ -3,11 +3,11 @@
   "projection": "capobara",
   "projectionSchemaVersion": 1,
   "sourceRepository": "dx-corp/mono",
-  "sourceSha": "2df44a8283c07c0ba875174e70d2aaabb72d19cc",
+  "sourceSha": "3ccfbea716d8d52596980ca1f1f3b62166e7849d",
   "destinationRepository": "dx-corp/capobara",
-  "priorProjectedBase": "05f55084905bd7f79cee5c2490fa63f01ee9c43e",
+  "priorProjectedBase": "72796ef8e718acb181dbf0e101fe4b0af45b62e9",
   "definitionDigest": "7826c75cbd356dad6c867f2606ebde8b79ef4361353908cf33ada720034ec488",
-  "toolDigest": "f58d71f023a4f0a27d77cb96dcc5348a40816d0b",
-  "contentDigest": "c364d273ea10128a23de009cd2180dde514640e12bb6494bd36f246afe778bc0",
+  "toolDigest": "898e8657d9153a2a51d7c283bf83bb3350b5d1e6",
+  "contentDigest": "e885e1248460736b96bfc794621e93051f8756668175e264adc51b6ce53ed7e3",
   "publicationEligible": true
 }
diff --git a/tests/catalog.rs b/tests/catalog.rs
index 509cfba..132de84 100644
--- a/tests/catalog.rs
+++ b/tests/catalog.rs
@@ -1,3 +1,14 @@
+macro_rules! cargo_bin {
+    ($name:literal) => {{
+        option_env!(concat!("CARGO_BIN_EXE_", $name))
+            .map(std::path::PathBuf::from)
+            .or_else(|| {
+                std::env::var_os(concat!("CARGO_BIN_EXE_", $name)).map(std::path::PathBuf::from)
+            })
+            .expect(concat!("Cargo binary path unavailable: ", $name))
+    }};
+}
+
 mod support;
 use capobara::catalog::{assert_main_authorized_revision, publication_matrix, read_catalog};
 use support::Repo;
@@ -156,7 +167,7 @@ fn capobara() -> std::process::Command {
         clippy::disallowed_methods,
         reason = "integration test executes the capobara binary"
     )]
-    std::process::Command::new(env!("CARGO_BIN_EXE_capobara"))
+    std::process::Command::new(cargo_bin!("capobara"))
 }
 
 /// `catalog check`/`catalog matrix`'s `--root` resolution. Node's `ROOT`
diff --git a/tests/cli.rs b/tests/cli.rs
index aa6ad6f..f5a7481 100644
--- a/tests/cli.rs
+++ b/tests/cli.rs
@@ -1,3 +1,14 @@
+macro_rules! cargo_bin {
+    ($name:literal) => {{
+        option_env!(concat!("CARGO_BIN_EXE_", $name))
+            .map(std::path::PathBuf::from)
+            .or_else(|| {
+                std::env::var_os(concat!("CARGO_BIN_EXE_", $name)).map(std::path::PathBuf::from)
+            })
+            .expect(concat!("Cargo binary path unavailable: ", $name))
+    }};
+}
+
 mod support;
 
 use std::process::Command;
@@ -7,7 +18,7 @@ fn bin() -> Command {
         clippy::disallowed_methods,
         reason = "integration test executes the capobara binary"
     )]
-    Command::new(env!("CARGO_BIN_EXE_capobara"))
+    Command::new(cargo_bin!("capobara"))
 }
 
 #[test]
diff --git a/tests/project_cli.rs b/tests/project_cli.rs
index 0478abe..24fe197 100644
--- a/tests/project_cli.rs
+++ b/tests/project_cli.rs
@@ -1,3 +1,14 @@
+macro_rules! cargo_bin {
+    ($name:literal) => {{
+        option_env!(concat!("CARGO_BIN_EXE_", $name))
+            .map(std::path::PathBuf::from)
+            .or_else(|| {
+                std::env::var_os(concat!("CARGO_BIN_EXE_", $name)).map(std::path::PathBuf::from)
+            })
+            .expect(concat!("Cargo binary path unavailable: ", $name))
+    }};
+}
+
 mod support;
 use std::process::Command;
 use support::Repo;
@@ -7,7 +18,7 @@ fn capobara() -> Command {
         clippy::disallowed_methods,
         reason = "integration test executes the capobara binary"
     )]
-    Command::new(env!("CARGO_BIN_EXE_capobara"))
+    Command::new(cargo_bin!("capobara"))
 }
 
 fn definition_json(name: &str) -> String {
diff --git a/tests/run_cli.rs b/tests/run_cli.rs
index 23ac08b..92ba57a 100644
--- a/tests/run_cli.rs
+++ b/tests/run_cli.rs
@@ -39,6 +39,17 @@
 // failing.
 #![cfg(debug_assertions)]
 
+macro_rules! cargo_bin {
+    ($name:literal) => {{
+        option_env!(concat!("CARGO_BIN_EXE_", $name))
+            .map(std::path::PathBuf::from)
+            .or_else(|| {
+                std::env::var_os(concat!("CARGO_BIN_EXE_", $name)).map(std::path::PathBuf::from)
+            })
+            .expect(concat!("Cargo binary path unavailable: ", $name))
+    }};
+}
+
 mod support;
 
 use std::path::{Path, PathBuf};
@@ -125,7 +136,7 @@ fn capobara() -> Command {
         clippy::disallowed_methods,
         reason = "integration test executes the capobara binary"
     )]
-    Command::new(env!("CARGO_BIN_EXE_capobara"))
+    Command::new(cargo_bin!("capobara"))
 }
 
 fn run_git(path: &Path, args: &[&str]) -> String {
diff --git a/tests/sdk_assembly.rs b/tests/sdk_assembly.rs
index db732cd..84d8d7b 100644
--- a/tests/sdk_assembly.rs
+++ b/tests/sdk_assembly.rs
@@ -15,6 +15,17 @@
 //! the closure's extension swap expects); and the Go closure's `deixic/v1`
 //! root imports every other generated Go package by its full module path.
 
+macro_rules! cargo_bin {
+    ($name:literal) => {{
+        option_env!(concat!("CARGO_BIN_EXE_", $name))
+            .map(std::path::PathBuf::from)
+            .or_else(|| {
+                std::env::var_os(concat!("CARGO_BIN_EXE_", $name)).map(std::path::PathBuf::from)
+            })
+            .expect(concat!("Cargo binary path unavailable: ", $name))
+    }};
+}
+
 mod support;
 
 use std::collections::BTreeSet;
@@ -431,7 +442,7 @@ fn capobara() -> Command {
         clippy::disallowed_methods,
         reason = "integration test executes the capobara binary"
     )]
-    Command::new(env!("CARGO_BIN_EXE_capobara"))
+    Command::new(cargo_bin!("capobara"))
 }
 
 // Debug-only, like `tests/project_cli.rs`: the synthetic source repository's
diff --git a/tests/transport_git.rs b/tests/transport_git.rs
index 2f15688..e160d5a 100644
--- a/tests/transport_git.rs
+++ b/tests/transport_git.rs
@@ -45,6 +45,17 @@
 // off (e.g. `cargo test --release`) instead of failing to compile.
 #![cfg(debug_assertions)]
 #![allow(dead_code)]
+macro_rules! cargo_bin {
+    ($name:literal) => {{
+        option_env!(concat!("CARGO_BIN_EXE_", $name))
+            .map(std::path::PathBuf::from)
+            .or_else(|| {
+                std::env::var_os(concat!("CARGO_BIN_EXE_", $name)).map(std::path::PathBuf::from)
+            })
+            .expect(concat!("Cargo binary path unavailable: ", $name))
+    }};
+}
+
 mod support;
 
 use std::path::{Path, PathBuf};
@@ -143,7 +154,7 @@ fn capobara() -> Command {
         clippy::disallowed_methods,
         reason = "integration test executes the capobara binary"
     )]
-    Command::new(env!("CARGO_BIN_EXE_capobara"))
+    Command::new(cargo_bin!("capobara"))
 }
 
 /// Runs `capobara <command> --definition ... --source ... --source-sha ...