diff --git a/.renovaterc.json b/.renovaterc.json
index d11c983b..81bb5d53 100644
--- a/.renovaterc.json
+++ b/.renovaterc.json
@@ -29,7 +29,8 @@
             ],
             "matchStrings": [
                 "pip install.* (?<depName>.*?)(\\[.*?\\])?==(?<currentValue>.*?)[\"\n]",
-                "pipx install( --force)? (?<depName>.*?)(\\[.*?\\])?==(?<currentValue>.*?)\\s"
+                "pipx install( --force)? (?<depName>.*?)(\\[.*?\\])?==(?<currentValue>.*?)\\s",
+                "pipx list --short \\| grep -q \"(?<depName>.*?)(\\[.*?\\])? (?<currentValue>.*?)\""
             ]
         },
         {
diff --git a/Makefile b/Makefile
index 86839553..9940a14e 100644
--- a/Makefile
+++ b/Makefile
@@ -61,13 +61,14 @@ lock:
 
 # Install standalone tools
 prerequisites:
-	pipx install --force check-jsonschema==0.31.0
-	pipx install --force codespell[toml]==2.4.1
-	pipx install --force pdm==2.22.3
-	pipx install --force pre-commit==4.1.0
-	pipx install --force pyproject-fmt==2.5.0
-	pipx install --force ruff==0.9.3
-	pipx install --force watchfiles==1.0.4
+	pipx list --short | grep -q "check-jsonschema 0.31.0" || pipx install --force check-jsonschema==0.31.0
+	pipx list --short | grep -q "codespell 2.4.1" || pipx install --force codespell[toml]==2.4.1
+	pipx list --short | grep -q "copier 9.4.1" || pipx install --force copier==9.4.1
+	pipx list --short | grep -q "pdm 2.22.3" || pipx install --force pdm==2.22.3
+	pipx list --short | grep -q "pre-commit 4.1.0" || pipx install --force pre-commit==4.1.0
+	pipx list --short | grep -q "pyproject-fmt 2.5.0" || pipx install --force pyproject-fmt==2.5.0
+	pipx list --short | grep -q "ruff 0.9.3" || pipx install --force ruff==0.9.3
+	pipx list --short | grep -q "watchfiles 1.0.4" || pipx install --force watchfiles==1.0.4
 
 ########################################################################################
 # Lint and pre-commit
@@ -98,7 +99,7 @@ check-jsonschema:
 	check-jsonschema --builtin-schema vendor.github-workflows .github/workflows/*.yml
 	check-jsonschema --builtin-schema vendor.gitlab-ci --data-transform gitlab-ci --regex-variant nonunicode .gitlab-ci.yml .gitlab/workflows/*.yml
 	check-jsonschema --builtin-schema vendor.readthedocs .readthedocs.yaml
-	check-jsonschema --builtin-schema vendor.renovate .renovaterc.json
+	check-jsonschema --builtin-schema vendor.renovate --regex-variant nonunicode .renovaterc.json
 
 # Check lint with all linters.
 lint: mypy ruff ruff-format pyproject-fmt codespell check-jsonschema
diff --git a/template/.renovaterc.json.jinja b/template/.renovaterc.json.jinja
index 5983c05b..66577ecb 100644
--- a/template/.renovaterc.json.jinja
+++ b/template/.renovaterc.json.jinja
@@ -32,7 +32,8 @@
             ],
             "matchStrings": [
                 "pip install.* (?<depName>.*?)(\\[.*?\\])?==(?<currentValue>.*?)[\"\n]",
-                "pipx install( --force)? (?<depName>.*?)(\\[.*?\\])?==(?<currentValue>.*?)\\s"
+                "pipx install( --force)? (?<depName>.*?)(\\[.*?\\])?==(?<currentValue>.*?)\\s",
+                "pipx list --short \\| grep -q \"(?<depName>.*?)(\\[.*?\\])? (?<currentValue>.*?)\""
             ]
         },
         {
diff --git a/template/Makefile.jinja b/template/Makefile.jinja
index 68dcc851..4b546a1b 100644
--- a/template/Makefile.jinja
+++ b/template/Makefile.jinja
@@ -65,13 +65,16 @@ lock:
 
 # Install standalone tools
 prerequisites:
-	pipx install --force check-jsonschema==0.31.0
-	pipx install --force codespell[toml]==2.4.1
-	pipx install --force pdm==2.22.3
-	pipx install --force pre-commit==4.1.0
-	pipx install --force pyproject-fmt==2.5.0
-	pipx install --force ruff==0.9.3
-	pipx install --force watchfiles==1.0.4
+	pipx list --short | grep -q "check-jsonschema 0.31.0" || pipx install --force check-jsonschema==0.31.0
+	pipx list --short | grep -q "codespell 2.4.1" || pipx install --force codespell[toml]==2.4.1
+{% if project_name == "Serious Scaffold Python" %}
+	pipx list --short | grep -q "copier 9.4.1" || pipx install --force copier==9.4.1
+{% endif %}
+	pipx list --short | grep -q "pdm 2.22.3" || pipx install --force pdm==2.22.3
+	pipx list --short | grep -q "pre-commit 4.1.0" || pipx install --force pre-commit==4.1.0
+	pipx list --short | grep -q "pyproject-fmt 2.5.0" || pipx install --force pyproject-fmt==2.5.0
+	pipx list --short | grep -q "ruff 0.9.3" || pipx install --force ruff==0.9.3
+	pipx list --short | grep -q "watchfiles 1.0.4" || pipx install --force watchfiles==1.0.4
 
 ########################################################################################
 # Lint and pre-commit
@@ -106,7 +109,7 @@ check-jsonschema:
 	check-jsonschema --builtin-schema vendor.gitlab-ci --data-transform gitlab-ci --regex-variant nonunicode .gitlab-ci.yml .gitlab/workflows/*.yml
 {% endif %}
 	check-jsonschema --builtin-schema vendor.readthedocs .readthedocs.yaml
-	check-jsonschema --builtin-schema vendor.renovate .renovaterc.json
+	check-jsonschema --builtin-schema vendor.renovate --regex-variant nonunicode .renovaterc.json
 
 # Check lint with all linters.
 lint: mypy ruff ruff-format pyproject-fmt codespell check-jsonschema