diff --git a/Makefile b/Makefile
index 7e767da..181fb4b 100644
--- a/Makefile
+++ b/Makefile
@@ -1,13 +1,16 @@
 SRC=$(shell find . -name \*.rs | grep -v "^./target")
-
-.PHONY: debug
-debug:
-	cargo build
+PREFIX?=/usr/local
+ROOT_SBINDIR?=$(PREFIX)/sbin
+INSTALL=install
 
 .PHONY: release
 release:
 	cargo build --release
 
+.PHONY: debug
+debug:
+	cargo build
+
 .PHONY: check
 check:
 	RUST_BACKTRACE=1 cargo test -- --nocapture
@@ -24,3 +27,6 @@ fmt:
 .PHONY: clean
 clean:
 	-cargo clean
+
+install:
+	$(INSTALL) -m0755 -D target/release/puzzlefs -t $(ROOT_SBINDIR)
diff --git a/puzzlefs-lib/src/format/types.rs b/puzzlefs-lib/src/format/types.rs
index c472927..da1d276 100644
--- a/puzzlefs-lib/src/format/types.rs
+++ b/puzzlefs-lib/src/format/types.rs
@@ -794,10 +794,8 @@ impl Serialize for Digest {
 impl TryFrom<&str> for Digest {
     type Error = FromHexError;
     fn try_from(s: &str) -> std::result::Result<Self, Self::Error> {
-        let digest = hex::decode(s)?;
-        let digest: [u8; SHA256_BLOCK_SIZE] = digest
-            .try_into()
-            .map_err(|_| FromHexError::InvalidStringLength)?;
+        let mut digest: [u8; SHA256_BLOCK_SIZE] = [0; SHA256_BLOCK_SIZE];
+        hex::decode_to_slice(s, &mut digest)?;
         Ok(Digest(digest))
     }
 }