diff --git a/src/uucore/Cargo.toml b/src/uucore/Cargo.toml
index d376e807a..823591084 100644
--- a/src/uucore/Cargo.toml
+++ b/src/uucore/Cargo.toml
@@ -40,16 +40,16 @@ libc = { workspace = true, optional = true }
 once_cell = { workspace = true }
 os_display = "0.1.3"
 
-digest = { workspace = true }
-hex = { workspace = true }
-memchr = { workspace = true }
-md-5 = { workspace = true }
-sha1 = { workspace = true }
-sha2 = { workspace = true }
-sha3 = { workspace = true }
-blake2b_simd = { workspace = true }
-blake3 = { workspace = true }
-sm3 = { workspace = true }
+digest = { workspace = true, optional = true }
+hex = { workspace = true, optional = true }
+memchr = { workspace = true, optional = true }
+md-5 = { workspace = true, optional = true }
+sha1 = { workspace = true, optional = true }
+sha2 = { workspace = true, optional = true }
+sha3 = { workspace = true, optional = true }
+blake2b_simd = { workspace = true, optional = true }
+blake3 = { workspace = true, optional = true }
+sm3 = { workspace = true, optional = true }
 
 [target.'cfg(unix)'.dependencies]
 walkdir = { workspace = true, optional = true }
@@ -86,4 +86,15 @@ utf8 = []
 utmpx = ["time", "time/macros", "libc", "dns-lookup"]
 wide = []
 pipes = []
-sum = []
+sum = [
+  "digest",
+  "hex",
+  "memchr",
+  "md-5",
+  "sha1",
+  "sha2",
+  "sha3",
+  "blake2b_simd",
+  "blake3",
+  "sm3",
+]