diff --git a/.ci/image/Dockerfile.linux b/.ci/image/Dockerfile.linux
index df10059..4927810 100644
--- a/.ci/image/Dockerfile.linux
+++ b/.ci/image/Dockerfile.linux
@@ -5,7 +5,6 @@ RUN set -eux; \
     apt-get install --no-install-recommends -y \
         build-essential \
         curl \
-        git \
         gpg \
         jq \
      	libatk1.0-dev \
diff --git a/.ci/pipelines/base-pipeline.yml b/.ci/pipelines/base-pipeline.yml
index f231fb7..ae9e323 100644
--- a/.ci/pipelines/base-pipeline.yml
+++ b/.ci/pipelines/base-pipeline.yml
@@ -40,4 +40,4 @@ jobs:
         pr: ((.:pr))
         gitea_api_key: ((gitea_api_key))
       instance_vars:
-        number: ((.:pr.number))
+        n: ((.:pr.number))
diff --git a/.ci/pipelines/pr.yml b/.ci/pipelines/pr.yml
index a9060f9..146f987 100644
--- a/.ci/pipelines/pr.yml
+++ b/.ci/pipelines/pr.yml
@@ -37,6 +37,7 @@ resources:
     url: http://forgejo:3000
     owner: bitsquid_dt
     repo: dtmt
+    sha: ((pr.head.sha))
     context: lint/clippy
     description: Checking for common mistakes and opportunities for code improvement
 
@@ -47,6 +48,7 @@ resources:
     url: http://forgejo:3000
     owner: bitsquid_dt
     repo: dtmt
+    sha: ((pr.head.sha))
     context: build/msvc
     description: "Build for the target platform: msvc"
 
@@ -57,6 +59,7 @@ resources:
     url: http://forgejo:3000
     owner: bitsquid_dt
     repo: dtmt
+    sha: ((pr.head.sha))
     context: build/linux
     description: "Build for the target platform: linux"
 
@@ -69,7 +72,6 @@ jobs:
     no_get: true
     params:
       state: success
-      sha: ((.:git_sha))
 
   on_failure:
     put: state-failure
@@ -77,21 +79,16 @@ jobs:
     no_get: true
     params:
       state: failure
-      sha: ((.:git_sha))
 
   plan:
-  - get: repo
-    trigger: true
-
-  - load_var: git_sha
-    file: repo/.git/ref
-
   - put: state-pending
     resource: pr-status-lint-clippy
     no_get: true
     params:
       state: pending
-      sha: ((.:git_sha))
+
+  - get: repo
+    trigger: true
 
   - task: check
     file: repo/.ci/tasks/clippy.yml
@@ -106,7 +103,6 @@ jobs:
     no_get: true
     params:
       state: success
-      sha: ((.:git_sha))
 
   on_failure:
     put: state-failure
@@ -114,21 +110,16 @@ jobs:
     no_get: true
     params:
       state: failure
-      sha: ((.:git_sha))
 
   plan:
-  - get: repo
-    trigger: true
-
-  - load_var: git_sha
-    file: repo/.git/ref
-
   - put: state-pending
     resource: pr-status-build-msvc
     no_get: true
     params:
       state: pending
-      sha: ((.:git_sha))
+
+  - get: repo
+    trigger: true
 
   - task: build
     file: repo/.ci/tasks/build.yml
@@ -163,7 +154,6 @@ jobs:
     no_get: true
     params:
       state: success
-      sha: ((.:git_sha))
 
   on_failure:
     put: state-failure
@@ -171,21 +161,16 @@ jobs:
     no_get: true
     params:
       state: failure
-      sha: ((.:git_sha))
 
   plan:
-  - get: repo
-    trigger: true
-
-  - load_var: git_sha
-    file: repo/.git/ref
-
   - put: state-pending
     resource: pr-status-build-linux
     no_get: true
     params:
       state: pending
-      sha: ((.:git_sha))
+
+  - get: repo
+    trigger: true
 
   - task: build
     file: repo/.ci/tasks/build.yml
diff --git a/.ci/tasks/build.sh b/.ci/tasks/build.sh
index 9d294b8..4c70a10 100755
--- a/.ci/tasks/build.sh
+++ b/.ci/tasks/build.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 set -eu
 
@@ -16,7 +16,7 @@ cd "repo"
 
 if [ -n "${PR:-}" ]; then
     title "PR: $(echo "$PR" | jq '.number') - $(echo "$PR" | jq '.title')"
-    ref="pr-$(echo "$PR" | jq '.number')-$(git rev-parse --short "$(cat .git/ref || echo "HEAD")" 2>/dev/null || echo 'manual')"
+    ref="pr-$(echo "$PR" | jq '.number')-$(git rev-parse --short $(cat .git/ref || echo "HEAD")) 2>/dev/null || echo 'manual')"
 else
     ref=$(git describe --tags)
 fi
diff --git a/Justfile b/Justfile
index 70af61a..964dc1f 100644
--- a/Justfile
+++ b/Justfile
@@ -29,7 +29,7 @@ ci-image-linux:
     docker push registry.sclu1034.dev/dtmt-ci-base-linux
 
 set-base-pipeline:
-    fly -t {{fly_target}} set-pipeline \
+    fly -t ((fly_target)) set-pipeline \
         --pipeline dtmt-prs \
         --config .ci/pipelines/base-pipeline.yml \
         -v gitea_api_key=${GITEA_API_KEY} \
@@ -46,7 +46,7 @@ set-pr-pipeline pr:
         --pipeline dtmt-pr \
         --config .ci/pipelines/pr.yml \
         -v gitea_api_key=${GITEA_API_KEY} \
-        -i number={{pr}} \
+        -i n={{pr}} \
         -y branch="$(yq -y '.head.ref' 'pr-{{pr}}.yaml')" \
         -y pr="$(cat 'pr-{{pr}}.yaml')"