diff --git a/cli/build.rs b/cli/build.rs
index 942c616981..d949b02c6e 100644
--- a/cli/build.rs
+++ b/cli/build.rs
@@ -47,7 +47,7 @@ fn main() -> std::io::Result<()> {
     if let Some((mut git_hash, maybe_date)) = get_git_timestamp_and_hash() {
         git_hash.truncate(16);
         println!(
-            "cargo:rustc-env=JJ_VERSION={}-{}-{}",
+            "cargo:rustc-env=JJ_VERSION={}+{}-{}",
             version,
             maybe_date
                 .map(|d| d.format("%Y%m%d").to_string())
diff --git a/cli/tests/test_global_opts.rs b/cli/tests/test_global_opts.rs
index 0a28351e51..5756aa3b4b 100644
--- a/cli/tests/test_global_opts.rs
+++ b/cli/tests/test_global_opts.rs
@@ -72,10 +72,10 @@ fn test_no_subcommand() {
     assert_matches!(
         sanitized.as_str(),
         "jj ?.??.?\n"
-            | "jj ?.??.?-????????-????????????????\n"
+            | "jj ?.??.?+????????-????????????????\n"
             // `dateunknown` turns into `??t?unknown` since d,a,e are hex digits.
             // TODO(ilyagr): This might be clearer as a regex.
-            | "jj ?.??.?-??t?unknown-????????????????\n"
+            | "jj ?.??.?+??t?unknown-????????????????\n"
     );
 
     let stdout = test_env.jj_cmd_success(test_env.env_root(), &["-R", "repo"]);