diff --git a/assets/modules/store/css/style.css b/assets/modules/store/css/style.css
index 4b17223629..67784e6cf1 100644
--- a/assets/modules/store/css/style.css
+++ b/assets/modules/store/css/style.css
@@ -1064,6 +1064,7 @@ input#store_search:focus {
   display: block;
   min-width: 0;
   overflow-wrap: anywhere;
+  white-space: pre-wrap;
   color: #d8dee6;
   font-size: 13px;
   line-height: 1.35;
diff --git a/core/src/Console/Packages/InstallPackageRequireCommand.php b/core/src/Console/Packages/InstallPackageRequireCommand.php
index de2a9c65ef..a3ef3345a1 100644
--- a/core/src/Console/Packages/InstallPackageRequireCommand.php
+++ b/core/src/Console/Packages/InstallPackageRequireCommand.php
@@ -95,7 +95,15 @@ public function putComposer()
     public function runComposer()
     {
         putenv('COMPOSER_HOME=' . EVO_CORE_PATH . 'composer');
-        $arguments = ['command' => 'update'];
+        // A partial update: only the requested package and what it pulls in may
+        // move. A bare `update` re-resolves the whole lock for the running PHP,
+        // which on a container whose vendor tree was built on 8.3 and runs on
+        // 8.4 rewrote 62 core packages before the extra was even touched.
+        $arguments = [
+            'command' => 'update',
+            'packages' => [(string) $this->argument('key')],
+            '--with-all-dependencies' => true,
+        ];
         if ($this->hasCommandOption('no-dev') && $this->option('no-dev')) {
             $arguments['--no-dev'] = true;
         }
diff --git a/core/src/Services/SystemTasks/ConsoleInstallFlowService.php b/core/src/Services/SystemTasks/ConsoleInstallFlowService.php
index 1baceed04d..c10c3ac103 100644
--- a/core/src/Services/SystemTasks/ConsoleInstallFlowService.php
+++ b/core/src/Services/SystemTasks/ConsoleInstallFlowService.php
@@ -7,6 +7,8 @@
 
 class ConsoleInstallFlowService implements SystemTaskHandlerInterface
 {
+    use ReportsProcessFailure;
+
     protected CatalogService $catalogService;
 
     public function __construct(?CatalogService $catalogService = null)
@@ -33,6 +35,7 @@ public function execute(SystemCliTask $task, ?callable $report = null)
                 'key' => $composerName,
                 'value' => $composerVersion,
                 'composer_run' => 1,
+                '--no-dev' => !$this->vendorHasDevPackages(),
             ],
             'install_require',
             30,
@@ -107,7 +110,9 @@ protected function runArtisanCommand($command, array $arguments, $step, $progres
         }
 
         if ((int) $exitCode !== 0) {
-            $reason = $this->summarizeOutput($output);
+            $this->reportProcessFailure($report, $step, $progress, $command, $exitCode, $output);
+
+            $reason = $this->summarizeOutput($output, true);
             if ($reason !== '') {
                 throw new \RuntimeException($command . ' failed with exit code ' . (int) $exitCode . '. ' . $reason);
             }
@@ -116,6 +121,23 @@ protected function runArtisanCommand($command, array $arguments, $step, $progres
         }
     }
 
+    /**
+     * Does vendor/ carry require-dev packages? Mirrors that state into the
+     * composer run so an install neither strips a dev checkout nor pulls the
+     * dev tree into a --no-dev production build.
+     */
+    protected function vendorHasDevPackages(): bool
+    {
+        $installed = EVO_CORE_PATH . 'vendor/composer/installed.json';
+        if (!file_exists($installed)) {
+            return true;
+        }
+
+        $data = json_decode((string) file_get_contents($installed), true);
+
+        return !is_array($data) || !array_key_exists('dev', $data) || (bool) $data['dev'];
+    }
+
     protected function buildArtisanProcessArguments($command, array $arguments)
     {
         $parts = [PHP_BINARY, EVO_CORE_PATH . 'artisan', $command];
@@ -276,7 +298,7 @@ protected function isComposerDependencyName(string $name): bool
         return true;
     }
 
-    protected function summarizeOutput($output)
+    protected function summarizeOutput($output, bool $fromEnd = false)
     {
         $lines = preg_split('/\r\n|\r|\n/', trim((string) $output));
         $lines = array_values(array_filter(array_map(function ($line) {
@@ -303,7 +325,7 @@ protected function summarizeOutput($output)
             return true;
         }));
 
-        $output = implode(' ', array_slice($lines, 0, 3));
+        $output = implode(' ', $this->pickSummaryLines($lines, $fromEnd, $fromEnd ? 5 : 3));
         if ($output === '') {
             return '';
         }
diff --git a/core/src/Services/SystemTasks/ConsoleUninstallFlowService.php b/core/src/Services/SystemTasks/ConsoleUninstallFlowService.php
index 77afcd1b34..08fb9b7334 100644
--- a/core/src/Services/SystemTasks/ConsoleUninstallFlowService.php
+++ b/core/src/Services/SystemTasks/ConsoleUninstallFlowService.php
@@ -6,6 +6,8 @@
 
 class ConsoleUninstallFlowService implements SystemTaskHandlerInterface
 {
+    use ReportsProcessFailure;
+
     protected string $corePath;
     protected string $providersDir;
     protected string $aliasesDir;
@@ -100,7 +102,9 @@ protected function runArtisanCommand($command, array $arguments, $step, $progres
         }
 
         if ((int) $exitCode !== 0) {
-            $reason = $this->summarizeOutput($output);
+            $this->reportProcessFailure($report, $step, $progress, $command, $exitCode, $output);
+
+            $reason = $this->summarizeOutput($output, true);
             if ($reason !== '') {
                 throw new \RuntimeException($command . ' failed with exit code ' . (int) $exitCode . '. ' . $reason);
             }
@@ -134,7 +138,7 @@ protected function buildArtisanProcessArguments($command, array $arguments)
         return $parts;
     }
 
-    protected function summarizeOutput($output)
+    protected function summarizeOutput($output, bool $fromEnd = false)
     {
         $lines = preg_split('/\r\n|\r|\n/', trim((string) $output));
         $lines = array_values(array_filter(array_map(function ($line) {
@@ -165,7 +169,7 @@ protected function summarizeOutput($output)
             return '';
         }
 
-        return implode(' ', array_slice($lines, 0, 3));
+        return implode(' ', $this->pickSummaryLines($lines, $fromEnd, $fromEnd ? 5 : 3));
     }
 
     protected function purgeInvalidDiscoveryArtifacts(?callable $report = null)
diff --git a/core/src/Services/SystemTasks/ReportsProcessFailure.php b/core/src/Services/SystemTasks/ReportsProcessFailure.php
new file mode 100644
index 0000000000..009a14874e
--- /dev/null
+++ b/core/src/Services/SystemTasks/ReportsProcessFailure.php
@@ -0,0 +1,36 @@
+<?php namespace EvolutionCMS\Services\SystemTasks;
+
+/**
+ * Puts the tail of a failed child process into the task log.
+ *
+ * Composer and artisan print their banner first and the error last, so the
+ * head of the output names the step and the tail names the failure. The
+ * manager renders log messages only, so the tail goes in there whole.
+ *
+ * @since 3.5.8
+ */
+trait ReportsProcessFailure
+{
+    protected function reportProcessFailure(?callable $report, $step, $progress, $label, $exitCode, $output, array $context = [])
+    {
+        $lines = preg_split('/\r\n|\r|\n/', trim((string) $output));
+        $tail = trim(implode("\n", array_slice($lines, -40)));
+        if ($tail === '') {
+            $tail = $label . ' produced no output.';
+        }
+
+        $this->report($report, $step, $progress, $tail, 'error', $context + [
+            'command' => $label,
+            'exit_code' => (int) $exitCode,
+            'output' => mb_substr((string) $output, -16000),
+        ]);
+    }
+
+    /**
+     * The one-line reason for the exception: last lines on failure, first lines otherwise.
+     */
+    protected function pickSummaryLines(array $lines, bool $fromEnd, int $count)
+    {
+        return $fromEnd ? array_slice($lines, -$count) : array_slice($lines, 0, $count);
+    }
+}
diff --git a/core/src/Services/SystemTasks/SiteUpdateFlowService.php b/core/src/Services/SystemTasks/SiteUpdateFlowService.php
index a81c87c53e..bbc5904def 100644
--- a/core/src/Services/SystemTasks/SiteUpdateFlowService.php
+++ b/core/src/Services/SystemTasks/SiteUpdateFlowService.php
@@ -7,6 +7,8 @@
 
 class SiteUpdateFlowService implements SystemTaskHandlerInterface
 {
+    use ReportsProcessFailure;
+
     protected string $corePath;
 
     public function __construct(?string $corePath = null)
@@ -79,7 +81,9 @@ public function execute(SystemCliTask $task, ?callable $report = null)
         }
 
         if ((int) $exitCode !== 0) {
-            $reason = $this->summarizeOutput($output);
+            $this->reportProcessFailure($report, 'site_update', 80, 'make:site', $exitCode, $output, $reportContext);
+
+            $reason = $this->summarizeOutput($output, true);
             if ($reason !== '') {
                 throw new \RuntimeException('Site update failed with exit code ' . (int) $exitCode . '. ' . $reason);
             }
@@ -158,7 +162,7 @@ protected function buildArtisanProcessArguments($command, array $arguments)
         return $parts;
     }
 
-    protected function summarizeOutput($output)
+    protected function summarizeOutput($output, bool $fromEnd = false)
     {
         $lines = preg_split('/\r\n|\r|\n/', trim((string) $output));
         $lines = array_values(array_filter(array_map(function ($line) {
@@ -175,7 +179,7 @@ protected function summarizeOutput($output)
             return '';
         }
 
-        return implode(' ', array_slice($lines, 0, 5));
+        return implode(' ', $this->pickSummaryLines($lines, $fromEnd, 5));
     }
 
     protected function report(?callable $report, $step, $progress, $message, $level = 'info', array $context = [])
diff --git a/core/tests/Unit/SystemTasks/ConsoleInstallFlowServiceTest.php b/core/tests/Unit/SystemTasks/ConsoleInstallFlowServiceTest.php
index bfb0bcd83a..9792082452 100644
--- a/core/tests/Unit/SystemTasks/ConsoleInstallFlowServiceTest.php
+++ b/core/tests/Unit/SystemTasks/ConsoleInstallFlowServiceTest.php
@@ -68,3 +68,20 @@ function invokeConsoleInstallFlowMethod(ConsoleInstallFlowService $service, stri
         'Vendor\\Package\\SecondaryServiceProvider',
     ]);
 });
+
+test('summarizeOutput reads the failure from the tail when asked', function () {
+    $service = new ConsoleInstallFlowService();
+
+    $output = implode("\n", [
+        'Evolution CMS 3.5.8',
+        'Lock file operations: 1 install, 62 updates, 0 removals',
+        '  - Upgrading composer/ca-bundle (1.5.13 => 1.5.14)',
+        'Your requirements could not be resolved to an installable set of packages.',
+        '  - elcreator/aimage 1.0.0 requires ext-imagick * -> it is missing from your system.',
+    ]);
+
+    expect(invokeConsoleInstallFlowMethod($service, 'summarizeOutput', [$output]))
+        ->toStartWith('Lock file operations')
+        ->and(invokeConsoleInstallFlowMethod($service, 'summarizeOutput', [$output, true]))
+        ->toContain('ext-imagick');
+});