diff --git a/pym/bob/input.py b/pym/bob/input.py
index b2c461311..fb7a3705d 100644
--- a/pym/bob/input.py
+++ b/pym/bob/input.py
@@ -3722,7 +3722,7 @@ def __createSchemas(self):
                         schema.Optional('environment') : VarDefineValidator("provideTools::environment"),
                         schema.Optional('fingerprintScript', default="") : str,
                         schema.Optional('fingerprintScriptBash') : str,
-                        schema.Optional('fingerprintScriptPwsh', default="") : str,
+                        schema.Optional('fingerprintScriptPwsh') : str,
                         schema.Optional('fingerprintIf') : schema.Or(None, str, bool, IfExpression),
                         schema.Optional('fingerprintVars') : [ varNameUseSchema ],
                     })
@@ -3742,7 +3742,7 @@ def __createSchemas(self):
             schema.Optional('packageNetAccess') : bool,
             schema.Optional('fingerprintScript', default="") : str,
             schema.Optional('fingerprintScriptBash') : str,
-            schema.Optional('fingerprintScriptPwsh', default="") : str,
+            schema.Optional('fingerprintScriptPwsh') : str,
             schema.Optional('fingerprintIf') : schema.Or(None, str, bool, IfExpression),
             schema.Optional('fingerprintVars') : [ varNameUseSchema ],
             schema.Optional('scriptLanguage') : schema.And(schema.Or("bash", "PowerShell"),
diff --git a/pym/bob/languages.py b/pym/bob/languages.py
index 4cc47b3a0..019149ed1 100644
--- a/pym/bob/languages.py
+++ b/pym/bob/languages.py
@@ -632,7 +632,7 @@ def mangleFingerprints(scriptFragments, env):
         # Add snippets as they match and a default settings preamble
         ret = [script]
         ret.extend(['$ErrorActionPreference="Stop"', 'Set-PSDebug -Strict'])
-        for n,v in sorted(env.items()):
+        for k,v in sorted(env.items()):
             ret.append('$Env:{}="{}"'.format(k, escapePwsh(v)))
         ret.append(PwshLanguage.HELPERS)
 
diff --git a/test/black-box/pwsh/recipes/root.yaml b/test/black-box/pwsh/recipes/root.yaml
index 2fdeffb10..7892256f4 100644
--- a/test/black-box/pwsh/recipes/root.yaml
+++ b/test/black-box/pwsh/recipes/root.yaml
@@ -4,9 +4,21 @@ depends:
     - name: sandbox
       use: [sandbox]
 
+environment:
+    FOO: bar
+
+fingerprintIf: True
+fingerprintVars: [FOO]
+fingerprintScript: |
+    Write-Output $Env:FOO
+    if ($Env:FOO -ne "bar") {
+        exit 1
+    }
+
 checkoutDeterministic: True
 checkoutScript: |
     Copy-Item $<<file.txt>> file.txt
+buildVars: [FOO]
 buildScript: |
     Copy-Item ($args[0] + "/file.txt")
 packageScript: |
diff --git a/test/black-box/pwsh/recipes/sandbox.yaml b/test/black-box/pwsh/recipes/sandbox.yaml
index f491d9114..3fbdffa76 100644
--- a/test/black-box/pwsh/recipes/sandbox.yaml
+++ b/test/black-box/pwsh/recipes/sandbox.yaml
@@ -1,6 +1,6 @@
 # Empty sandbox that mounts the whole host
 provideSandbox:
-    paths: []
+    paths: ["/usr/local/bin", "/usr/bin", "/bin"]
     mount:
         - /bin
         - /etc
diff --git a/test/black-box/pwsh/run.sh b/test/black-box/pwsh/run.sh
index 9d4301fe0..1ba597c57 100755
--- a/test/black-box/pwsh/run.sh
+++ b/test/black-box/pwsh/run.sh
@@ -14,8 +14,8 @@ RES=$(run_bob query-path -f '{dist}' --develop root)
 diff -u "$RES/file.txt" recipes/file.txt
 
 cleanup
-run_bob dev root
-RES=$(run_bob query-path -f '{dist}' --develop root)
+run_bob dev bash
+RES=$(run_bob query-path -f '{dist}' --develop bash)
 diff -u "$RES/file.txt" recipes/file.txt
 
 # Run the sandbox check only if namespace feature works on this host.