diff --git a/.github/workflows/basic_cli_build_release.yml b/.github/workflows/basic_cli_build_release.yml
index 5a5910d863c..96540564fb5 100644
--- a/.github/workflows/basic_cli_build_release.yml
+++ b/.github/workflows/basic_cli_build_release.yml
@@ -62,14 +62,14 @@ jobs:
           CARGO_BUILD_TARGET: x86_64-unknown-linux-musl
         run: ./ci/build_basic_cli.sh linux_x86_64
 
-      - name: Save .rh, .rm and .o file
+      - name: Save .rh, .rm and .a file
         uses: actions/upload-artifact@v4
         with:
           name: linux-x86_64-files
           path: |
             basic-cli/platform/metadata_linux-x64.rm
             basic-cli/platform/linux-x64.rh
-            basic-cli/platform/linux-x64.o
+            basic-cli/platform/linux-x64.a
 
 
   build-linux-arm64-files:
@@ -89,12 +89,12 @@ jobs:
           CARGO_TARGET_AARCH64_UNKNOWN_LINUX_MUSL_RUSTFLAGS: "-Clink-self-contained=yes -Clinker=rust-lld"
         run: ./ci/build_basic_cli.sh linux_arm64
 
-      - name: Save .o file
+      - name: Save .a file
         uses: actions/upload-artifact@v4
         with:
           name: linux-arm64-files
           path: |
-            basic-cli/platform/linux-arm64.o
+            basic-cli/platform/linux-arm64.a
 
   build-macos-x86_64-files:
     runs-on: [macos-12] # I expect the generated files to work on macOS 12 and up
@@ -107,15 +107,15 @@ jobs:
 
       - run: ./ci/build_basic_cli.sh macos_x86_64
 
-      - name: Save .o files
+      - name: Save .a file
         uses: actions/upload-artifact@v4
         with:
           name: macos-x86_64-files
           path: |
-            basic-cli/platform/macos-x64.o
+            basic-cli/platform/macos-x64.a
 
   build-macos-apple-silicon-files:
-    name: build apple silicon .o file
+    name: build apple silicon .a file
     runs-on: [self-hosted, macOS, ARM64]
     needs: [prepare]
     steps:
@@ -126,12 +126,12 @@ jobs:
 
       - run: ./ci/build_basic_cli.sh macos_apple_silicon
 
-      - name: Save macos-arm64.o file
+      - name: Save macos-arm64.a file
         uses: actions/upload-artifact@v4
         with:
           name: macos-apple-silicon-files
           path: |
-            basic-cli/platform/macos-arm64.o
+            basic-cli/platform/macos-arm64.a
 
   create-release-archive:
     needs: [build-linux-x86_64-files, build-linux-arm64-files, build-macos-x86_64-files, build-macos-apple-silicon-files]
diff --git a/ci/build_basic_cli.sh b/ci/build_basic_cli.sh
index e0328b8f88e..853a5be7304 100755
--- a/ci/build_basic_cli.sh
+++ b/ci/build_basic_cli.sh
@@ -45,8 +45,13 @@ roc version
 
 cd basic-cli
 if [[ "$OSTYPE" == "linux-gnu"* ]]; then
-    sed -i 's|target/release|target/x86_64-unknown-linux-musl/release|g' jump-start.sh
-    sed -i 's|target/release|target/x86_64-unknown-linux-musl/release|g' build.roc
+    if [[ $(uname -m) == "aarch64" ]]; then
+        target_arch="aarch64-unknown-linux-musl"
+    else
+        target_arch="x86_64-unknown-linux-musl"
+    fi
+    sed -i "s|target/release|target/$target_arch/release|g" jump-start.sh
+    sed -i "s|target/release|target/$target_arch/release|g" build.roc
 fi
 ./jump-start.sh