diff --git a/flake.nix b/flake.nix
index b93ad4aa..5d76568a 100644
--- a/flake.nix
+++ b/flake.nix
@@ -429,7 +429,6 @@
                 CatalystAuthenticationStoreDBIxClass
                 CatalystAuthenticationStoreLDAP
                 CatalystDevel
-                CatalystDispatchTypeRegex
                 CatalystPluginAccessLog
                 CatalystPluginAuthorizationRoles
                 CatalystPluginCaptcha
diff --git a/src/lib/Hydra.pm b/src/lib/Hydra.pm
index 6d85f3a9..07aec922 100644
--- a/src/lib/Hydra.pm
+++ b/src/lib/Hydra.pm
@@ -8,7 +8,6 @@ use Hydra::Plugin;
 use Hydra::Model::DB;
 use Catalyst::Runtime '5.70';
 use Catalyst qw/ConfigLoader
-                Unicode::Encoding
                 Static::Simple
                 StackTrace
                 Authentication
diff --git a/src/lib/Hydra/Controller/Root.pm b/src/lib/Hydra/Controller/Root.pm
index df178df4..01bb7b44 100644
--- a/src/lib/Hydra/Controller/Root.pm
+++ b/src/lib/Hydra/Controller/Root.pm
@@ -15,6 +15,9 @@ use JSON;
 use List::Util qw[min max];
 use List::MoreUtils qw{any};
 use Net::Prometheus;
+use Types::Standard qw/StrMatch/;
+
+use constant NARINFO_REGEX => qr{^([a-z0-9]{32})\.narinfo$};
 
 # Put this controller at top-level.
 __PACKAGE__->config->{namespace} = '';
@@ -349,17 +352,17 @@ sub nix_cache_info :Path('nix-cache-info') :Args(0) {
 }
 
 
-sub narinfo :LocalRegex('^([a-z0-9]+).narinfo$') :Args(0) {
-    my ($self, $c) = @_;
+sub narinfo :Path :Args(StrMatch[NARINFO_REGEX]) {
+    my ($self, $c, $narinfo) = @_;
 
     if (!isLocalStore) {
         notFound($c, "There is no binary cache here.");
     }
 
     else {
-        my $hash = $c->req->captures->[0];
+        my ($hash) = $narinfo =~ NARINFO_REGEX;
 
-        die if length($hash) != 32;
+        die("Hash length was not 32") if length($hash) != 32;
         my $path = queryPathFromHashPart($hash);
 
         if (!$path) {
diff --git a/src/lib/Hydra/Event.pm b/src/lib/Hydra/Event.pm
index e3954308..b14d74f4 100644
--- a/src/lib/Hydra/Event.pm
+++ b/src/lib/Hydra/Event.pm
@@ -17,7 +17,7 @@ sub parse_payload :prototype($$) {
     my ($channel_name, $payload) = @_;
     my @payload = split /\t/, $payload;
 
-    my $parser = %channels_to_events{$channel_name};
+    my $parser = $channels_to_events{$channel_name};
     unless (defined $parser) {
       die "Invalid channel name: '$channel_name'";
     }
diff --git a/src/lib/Hydra/Helper/CatalystUtils.pm b/src/lib/Hydra/Helper/CatalystUtils.pm
index 0b48e455..64e3c44f 100644
--- a/src/lib/Hydra/Helper/CatalystUtils.pm
+++ b/src/lib/Hydra/Helper/CatalystUtils.pm
@@ -279,7 +279,7 @@ sub requirePost {
 
 
 sub trim {
-    my $s = shift;
+    my $s = shift // "";
     $s =~ s/^\s+|\s+$//g;
     return $s;
 }
diff --git a/src/script/hydra-eval-jobset b/src/script/hydra-eval-jobset
index 7a9af09f..ad757771 100755
--- a/src/script/hydra-eval-jobset
+++ b/src/script/hydra-eval-jobset
@@ -644,7 +644,7 @@ sub checkJobsetWrapped {
     # Hash the arguments to hydra-eval-jobs and check the
     # JobsetInputHashes to see if the previous evaluation had the same
     # inputs.  If so, bail out.
-    my @args = ($jobset->nixexprinput, $jobset->nixexprpath, inputsToArgs($inputInfo));
+    my @args = ($jobset->nixexprinput // "", $jobset->nixexprpath // "", inputsToArgs($inputInfo));
     my $argsHash = sha256_hex("@args");
     my $prevEval = getPrevJobsetEval($db, $jobset, 0);
     if (defined $prevEval && $prevEval->hash eq $argsHash && !$dryRun && !$jobset->forceeval && $prevEval->flake eq $flakeRef) {
diff --git a/t/Controller/Root/narinfo.t b/t/Controller/Root/narinfo.t
new file mode 100644
index 00000000..297d336b
--- /dev/null
+++ b/t/Controller/Root/narinfo.t
@@ -0,0 +1,48 @@
+use strict;
+use warnings;
+use Setup;
+use Data::Dumper;
+use JSON qw(decode_json);
+my %ctx = test_init(
+  # Without this, the test will fail because a `file:` store is not treated as a
+  # local store by `isLocalStore` in src/lib/Hydra/Helper/Nix.pm, and any
+  # requests to /HASH.narinfo will fail.
+  use_external_destination_store => 0
+);
+
+require Hydra::Schema;
+require Hydra::Model::DB;
+require Hydra::Helper::Nix;
+
+use Test2::V0;
+require Catalyst::Test;
+use HTTP::Request::Common;
+Catalyst::Test->import('Hydra');
+
+my $db = Hydra::Model::DB->new;
+hydra_setup($db);
+
+my $project = $db->resultset('Projects')->create({name => "tests", displayname => "", owner => "root"});
+
+my $jobset = createBaseJobset("basic", "basic.nix", $ctx{jobsdir});
+
+ok(evalSucceeds($jobset), "Evaluating jobs/basic.nix should exit with return code 0");
+for my $build (queuedBuildsForJobset($jobset)) {
+    ok(runBuild($build), "Build '".$build->job."' from jobs/basic.nix should exit with return code 0");
+}
+
+subtest "/HASH.narinfo" => sub {
+    my $build_redirect = request(GET '/job/tests/basic/empty_dir/latest-finished');
+    my $url = URI->new($build_redirect->header('location'))->path;
+    my $json = request(GET $url, Accept => 'application/json');
+    my $data = decode_json($json->content);
+    my $outpath = $data->{buildoutputs}{out}{path};
+    my ($hash) = $outpath =~ qr{/nix/store/([a-z0-9]{32}).*};
+    my $narinfo_response = request(GET "/$hash.narinfo");
+    ok($narinfo_response->is_success, "Getting the narinfo of a build");
+
+    my ($storepath) = $narinfo_response->content =~ qr{StorePath: (.*)};
+    is($storepath, $outpath, "The returned store path is the same as the out path")
+};
+
+done_testing;
diff --git a/t/Helper/CatalystUtils.t b/t/Helper/CatalystUtils.t
new file mode 100644
index 00000000..26f8dcde
--- /dev/null
+++ b/t/Helper/CatalystUtils.t
@@ -0,0 +1,28 @@
+use strict;
+use warnings;
+use Setup;
+use Test2::V0;
+use Hydra::Helper::CatalystUtils;
+
+subtest "trim" => sub {
+    my %values = (
+        "" => "",
+        "🌮" => '🌮',
+        " 🌮" => '🌮',
+        "🌮 " => '🌮',
+        " 🌮 " => '🌮',
+        "\n🌮 " => '🌮',
+        "\n\t🌮\n\n\t" => '🌮',
+    );
+
+    for my $input (keys %values) {
+        my $value = $values{$input};
+        is(trim($input), $value, "Trim the value: " . $input);
+    }
+
+    my $uninitialized;
+
+    is(trim($uninitialized), '', "Trimming an uninitialized value");
+};
+
+done_testing;