diff --git a/.github/scripts/build.sh b/.github/scripts/build.sh
deleted file mode 100755
index ebd1f05..0000000
--- a/.github/scripts/build.sh
+++ /dev/null
@@ -1,25 +0,0 @@
-#!/usr/bin/env bash
-
-set -e
-
-cd "$(dirname "$0")/../.." || exit
-
-echo
-echo "--------------------------------"
-echo "SCALA_VERSION   = $SCALA_VERSION"
-echo "SBT_COMMAND     = $SBT_COMMAND"
-echo "--------------------------------"
-echo
-
-if [[ -z "$SCALA_VERSION" ]]; then
-    echo "ERROR: environment value SCALA_VERSION is not set!" 1>&2
-    exit 1
-fi
-
-if [[ -z "$SBT_COMMAND" ]]; then
-    echo "ERROR: environment value SBT_COMMAND is not set!" 1>&2
-    exit 1
-fi
-
-git add . && git reset --hard HEAD
-exec sbt -J-Xmx6144m ++$SCALA_VERSION $SBT_COMMAND
diff --git a/.github/scripts/release b/.github/scripts/release
index 603328b..d1be83c 100755
--- a/.github/scripts/release
+++ b/.github/scripts/release
@@ -1,5 +1,7 @@
 #!/usr/bin/env bash
 
+cd "$(dirname "$0")/.."
+
 git fetch --depth=100 origin +refs/tags/*:refs/tags/*
 
 if [ "$PUBLISH_STABLE_VERSION" != "true" ]; then
@@ -13,8 +15,8 @@ echo "PUBLISH_STABLE_VERSION=$PUBLISH_STABLE_VERSION"
 
 if [[ "$PUBLISH_STABLE_VERSION" = "true" ]]; then
   echo "Publishing stable version ..."
-  exec sbt +clean +publishSigned sonatypeBundleRelease
+  exec ./sbt +clean +publishSigned sonatypeBundleRelease
 else
   echo "Publishing snapshot ..."
-  exec sbt +clean +publishSigned
+  exec ./sbt +clean +publishSigned
 fi
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 9e8e01d..e7a5b14 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -9,7 +9,7 @@ on:
 
 jobs:
   tests:
-    name: Unit tests (scala ${{ matrix.scala }}, jvm ${{ matrix.java }})
+    name: Unit tests / JVM ${{ matrix.java }}
     strategy:
       fail-fast: false   
       matrix:
diff --git a/.github/workflows/manual-publish.yml b/.github/workflows/manual-publish.yml
index d6b8471..72b9be5 100644
--- a/.github/workflows/manual-publish.yml
+++ b/.github/workflows/manual-publish.yml
@@ -23,9 +23,12 @@ jobs:
           fetch-depth: 100
           ref: ${{ github.event.inputs.ref_to_publish }}
 
-      - uses: olafurpg/setup-scala@v10
+      - name: Set up JDK ${{ matrix.java-version }}
+        uses: actions/setup-java@v4
         with:
-          java-version: "adopt@1.8"
+          cache: 'sbt'
+          java-version: 8
+          distribution: 'temurin'
 
       - name: Install GnuPG2
         run: |
@@ -35,9 +38,9 @@ jobs:
         run: |
           git fetch --depth=100 origin +refs/tags/*:refs/tags/*
           if [ "$PUBLISH_STABLE_VERSION" = "true" ]; then
-            sbt ci-release
+            ./sbt ci-release
           else
-            sbt +clean +publishSigned
+            ./sbt +clean +publishSigned
           fi
         env:
           PGP_KEY_HEX: ${{ secrets.PGP_KEY_HEX }}