diff --git a/crates/fbuild-build/Cargo.toml b/crates/fbuild-build/Cargo.toml
index db97dd62..922044d1 100644
--- a/crates/fbuild-build/Cargo.toml
+++ b/crates/fbuild-build/Cargo.toml
@@ -5,6 +5,9 @@ version.workspace = true
 edition.workspace = true
 rust-version.workspace = true
 license.workspace = true
+# Not published to crates.io — distribution is PyPI + GitHub Releases;
+# this member exists purely for internal compile parallelism. FastLED/fbuild#1008.
+publish = false
 
 [dependencies]
 fbuild-core = { path = "../fbuild-core" }
diff --git a/crates/fbuild-cli/Cargo.toml b/crates/fbuild-cli/Cargo.toml
index 5220405d..3eaf49b0 100644
--- a/crates/fbuild-cli/Cargo.toml
+++ b/crates/fbuild-cli/Cargo.toml
@@ -5,6 +5,9 @@ version.workspace = true
 edition.workspace = true
 rust-version.workspace = true
 license.workspace = true
+# Not published to crates.io — distribution is PyPI + GitHub Releases;
+# this member exists purely for internal compile parallelism. FastLED/fbuild#1008.
+publish = false
 
 [[bin]]
 name = "fbuild"
diff --git a/crates/fbuild-config/Cargo.toml b/crates/fbuild-config/Cargo.toml
index 06af8f79..dbe69caf 100644
--- a/crates/fbuild-config/Cargo.toml
+++ b/crates/fbuild-config/Cargo.toml
@@ -5,6 +5,9 @@ version.workspace = true
 edition.workspace = true
 rust-version.workspace = true
 license.workspace = true
+# Not published to crates.io — distribution is PyPI + GitHub Releases;
+# this member exists purely for internal compile parallelism. FastLED/fbuild#1008.
+publish = false
 
 [[bin]]
 name = "enrich_boards"
diff --git a/crates/fbuild-core/Cargo.toml b/crates/fbuild-core/Cargo.toml
index 93dcf54b..0d3ceceb 100644
--- a/crates/fbuild-core/Cargo.toml
+++ b/crates/fbuild-core/Cargo.toml
@@ -5,6 +5,9 @@ version.workspace = true
 edition.workspace = true
 rust-version.workspace = true
 license.workspace = true
+# Not published to crates.io — distribution is PyPI + GitHub Releases;
+# this member exists purely for internal compile parallelism. FastLED/fbuild#1008.
+publish = false
 
 [dependencies]
 thiserror = { workspace = true }
diff --git a/crates/fbuild-daemon/Cargo.toml b/crates/fbuild-daemon/Cargo.toml
index 4a0ce7f9..5a0d5a8d 100644
--- a/crates/fbuild-daemon/Cargo.toml
+++ b/crates/fbuild-daemon/Cargo.toml
@@ -5,6 +5,9 @@ version.workspace = true
 edition.workspace = true
 rust-version.workspace = true
 license.workspace = true
+# Not published to crates.io — distribution is PyPI + GitHub Releases;
+# this member exists purely for internal compile parallelism. FastLED/fbuild#1008.
+publish = false
 
 [[bin]]
 name = "fbuild-daemon"
diff --git a/crates/fbuild-deploy/Cargo.toml b/crates/fbuild-deploy/Cargo.toml
index 1d06cda4..57f2832d 100644
--- a/crates/fbuild-deploy/Cargo.toml
+++ b/crates/fbuild-deploy/Cargo.toml
@@ -5,6 +5,9 @@ version.workspace = true
 edition.workspace = true
 rust-version.workspace = true
 license.workspace = true
+# Not published to crates.io — distribution is PyPI + GitHub Releases;
+# this member exists purely for internal compile parallelism. FastLED/fbuild#1008.
+publish = false
 
 [features]
 # Compile the native espflash-backed verify/write paths by default. The
diff --git a/crates/fbuild-header-scan/Cargo.toml b/crates/fbuild-header-scan/Cargo.toml
index 26003418..a47e35c7 100644
--- a/crates/fbuild-header-scan/Cargo.toml
+++ b/crates/fbuild-header-scan/Cargo.toml
@@ -5,6 +5,9 @@ version.workspace = true
 edition.workspace = true
 rust-version.workspace = true
 license.workspace = true
+# Not published to crates.io — distribution is PyPI + GitHub Releases;
+# this member exists purely for internal compile parallelism. FastLED/fbuild#1008.
+publish = false
 
 [dependencies]
 rayon = { workspace = true }
diff --git a/crates/fbuild-library-select/Cargo.toml b/crates/fbuild-library-select/Cargo.toml
index c4e6e861..0e4c7f01 100644
--- a/crates/fbuild-library-select/Cargo.toml
+++ b/crates/fbuild-library-select/Cargo.toml
@@ -5,6 +5,9 @@ version.workspace = true
 edition.workspace = true
 rust-version.workspace = true
 license.workspace = true
+# Not published to crates.io — distribution is PyPI + GitHub Releases;
+# this member exists purely for internal compile parallelism. FastLED/fbuild#1008.
+publish = false
 
 [dependencies]
 fbuild-header-scan = { path = "../fbuild-header-scan" }
diff --git a/crates/fbuild-packages/Cargo.toml b/crates/fbuild-packages/Cargo.toml
index 566ab53d..1d2ab70d 100644
--- a/crates/fbuild-packages/Cargo.toml
+++ b/crates/fbuild-packages/Cargo.toml
@@ -5,6 +5,9 @@ version.workspace = true
 edition.workspace = true
 rust-version.workspace = true
 license.workspace = true
+# Not published to crates.io — distribution is PyPI + GitHub Releases;
+# this member exists purely for internal compile parallelism. FastLED/fbuild#1008.
+publish = false
 
 [dependencies]
 fbuild-core = { path = "../fbuild-core" }
diff --git a/crates/fbuild-paths/Cargo.toml b/crates/fbuild-paths/Cargo.toml
index 72dad2b8..c4711eb2 100644
--- a/crates/fbuild-paths/Cargo.toml
+++ b/crates/fbuild-paths/Cargo.toml
@@ -5,6 +5,9 @@ version.workspace = true
 edition.workspace = true
 rust-version.workspace = true
 license.workspace = true
+# Not published to crates.io — distribution is PyPI + GitHub Releases;
+# this member exists purely for internal compile parallelism. FastLED/fbuild#1008.
+publish = false
 
 [dependencies]
 fbuild-core = { path = "../fbuild-core" }
diff --git a/crates/fbuild-python/Cargo.toml b/crates/fbuild-python/Cargo.toml
index bcfadbd1..d8f54fb8 100644
--- a/crates/fbuild-python/Cargo.toml
+++ b/crates/fbuild-python/Cargo.toml
@@ -5,6 +5,9 @@ version.workspace = true
 edition.workspace = true
 rust-version.workspace = true
 license.workspace = true
+# Not published to crates.io — distribution is PyPI + GitHub Releases;
+# this member exists purely for internal compile parallelism. FastLED/fbuild#1008.
+publish = false
 
 [features]
 default = []
diff --git a/crates/fbuild-serial/Cargo.toml b/crates/fbuild-serial/Cargo.toml
index 15a77c53..19692a0c 100644
--- a/crates/fbuild-serial/Cargo.toml
+++ b/crates/fbuild-serial/Cargo.toml
@@ -5,6 +5,9 @@ version.workspace = true
 edition.workspace = true
 rust-version.workspace = true
 license.workspace = true
+# Not published to crates.io — distribution is PyPI + GitHub Releases;
+# this member exists purely for internal compile parallelism. FastLED/fbuild#1008.
+publish = false
 
 [dependencies]
 fbuild-core = { path = "../fbuild-core" }
diff --git a/crates/fbuild-test-support/Cargo.toml b/crates/fbuild-test-support/Cargo.toml
index 121b02cb..d3232ddc 100644
--- a/crates/fbuild-test-support/Cargo.toml
+++ b/crates/fbuild-test-support/Cargo.toml
@@ -5,6 +5,9 @@ version.workspace = true
 edition.workspace = true
 rust-version.workspace = true
 license.workspace = true
+# Not published to crates.io — distribution is PyPI + GitHub Releases;
+# this member exists purely for internal compile parallelism. FastLED/fbuild#1008.
+publish = false
 
 [dependencies]
 object = { workspace = true }