diff --git a/.copr/Makefile b/.copr/Makefile
new file mode 100644
index 0000000..854ae9d
--- /dev/null
+++ b/.copr/Makefile
@@ -0,0 +1,9 @@
+.PHONY: srpm
+
+outdir ?= $(CURDIR)/.rpmbuild/SRPMS
+TOPDIR ?= $(CURDIR)/.rpmbuild
+
+srpm:
+	$(MAKE) -C "$(CURDIR)" srpm TOPDIR="$(TOPDIR)"
+	mkdir -p "$(outdir)"
+	cp "$(TOPDIR)"/SRPMS/*.src.rpm "$(outdir)"/
diff --git a/Makefile b/Makefile
index e777eeb..d4f90f7 100644
--- a/Makefile
+++ b/Makefile
@@ -1,16 +1,15 @@
 TOPDIR ?= $(CURDIR)/.rpmbuild
-ARCH ?= x86_64
 
 .PHONY: srpm srpm-x86_64 srpm-aarch64 clean
 
 srpm:
-	ARCH="$(ARCH)" TOPDIR="$(TOPDIR)" ./make-srpm.sh
+	TOPDIR="$(TOPDIR)" ./make-srpm.sh
 
 srpm-x86_64:
-	ARCH="x86_64" TOPDIR="$(TOPDIR)" ./make-srpm.sh
+	TOPDIR="$(TOPDIR)" ./make-srpm.sh
 
 srpm-aarch64:
-	ARCH="aarch64" TOPDIR="$(TOPDIR)" ./make-srpm.sh
+	TOPDIR="$(TOPDIR)" ./make-srpm.sh
 
 clean:
 	rm -rf "$(TOPDIR)"
diff --git a/codex.spec b/codex.spec
index 41c9dc5..f95162d 100644
--- a/codex.spec
+++ b/codex.spec
@@ -1,5 +1,4 @@
 %global up_version %{?up_version}%{!?up_version:0}
-%global package_arch %{?package_arch}%{!?package_arch:x86_64}
 %global debug_package %{nil}
 %global _build_id_links none
 %{!?bash_completions_dir:%global bash_completions_dir %{_datadir}/bash-completion/completions}
@@ -13,7 +12,8 @@ Summary:        OpenAI Codex command-line interface
 
 License:        Apache-2.0
 URL:            https://github.com/openai/codex
-Source0:        %{name}-%{version}-%{package_arch}-unknown-linux-musl.tar.gz
+Source0:        %{name}-%{version}-x86_64-unknown-linux-musl.tar.gz
+Source1:        %{name}-%{version}-aarch64-unknown-linux-musl.tar.gz
 
 ExclusiveArch:  x86_64 aarch64
 Requires:       git
@@ -22,7 +22,13 @@ Requires:       git
 OpenAI Codex is a coding assistant that runs in your terminal.
 
 %prep
-%autosetup -n %{name}-%{version}
+%setup -q -c -T
+%ifarch x86_64
+tar -xzf %{SOURCE0} --strip-components=1
+%endif
+%ifarch aarch64
+tar -xzf %{SOURCE1} --strip-components=1
+%endif
 
 %build
 
diff --git a/make-srpm.sh b/make-srpm.sh
index 18c6d4c..34383cd 100755
--- a/make-srpm.sh
+++ b/make-srpm.sh
@@ -7,19 +7,6 @@ SOURCES_DIR="$TOPDIR/SOURCES"
 SRPMS_DIR="$TOPDIR/SRPMS"
 SPECS_DIR="$TOPDIR/SPECS"
 WORK_DIR="$(mktemp -d)"
-ARCH="${ARCH:-x86_64}"
-
-case "$ARCH" in
-  x86_64|aarch64)
-    ;;
-  *)
-    echo "Unsupported ARCH: $ARCH. Supported values: x86_64, aarch64" >&2
-    exit 1
-    ;;
-esac
-
-ASSET_BASENAME="codex-$ARCH-unknown-linux-musl"
-LATEST_URL="https://github.com/openai/codex/releases/latest/download/$ASSET_BASENAME.tar.gz"
 LATEST_RELEASE_API="https://api.github.com/repos/openai/codex/releases/latest"
 
 cleanup() {
@@ -29,19 +16,6 @@ trap cleanup EXIT
 
 mkdir -p "$SOURCES_DIR" "$SRPMS_DIR" "$SPECS_DIR"
 
-ARCHIVE="$WORK_DIR/$ASSET_BASENAME.tar.gz"
-echo "Downloading latest Codex release tarball for $ARCH..."
-curl -fL --retry 3 --retry-delay 2 -o "$ARCHIVE" "$LATEST_URL"
-
-mkdir -p "$WORK_DIR/unpack"
-tar -xzf "$ARCHIVE" -C "$WORK_DIR/unpack"
-
-UPSTREAM_BINARY="$WORK_DIR/unpack/$ASSET_BASENAME"
-if [[ ! -x "$UPSTREAM_BINARY" ]]; then
-  echo "Expected upstream binary $ASSET_BASENAME, but it was not found." >&2
-  exit 1
-fi
-
 echo "Resolving latest release tag..."
 TAG="$(
   curl -fsSL --retry 3 --retry-delay 2 "$LATEST_RELEASE_API" \
@@ -58,30 +32,49 @@ if [[ -z "$VERSION" || "$VERSION" == "$TAG" ]]; then
   echo "Unexpected tag format: $TAG (expected rust-v<version>)." >&2
   exit 1
 fi
-SOURCE_TREE="$WORK_DIR/codex-$VERSION"
-mkdir -p "$SOURCE_TREE"
-
-install -pm 0755 "$UPSTREAM_BINARY" "$SOURCE_TREE/codex"
 
 echo "Downloading LICENSE and README for $TAG..."
 curl -fL --retry 3 --retry-delay 2 \
-  -o "$SOURCE_TREE/LICENSE" \
+  -o "$WORK_DIR/LICENSE" \
   "https://raw.githubusercontent.com/openai/codex/$TAG/LICENSE"
 curl -fL --retry 3 --retry-delay 2 \
-  -o "$SOURCE_TREE/README.md" \
+  -o "$WORK_DIR/README.md" \
   "https://raw.githubusercontent.com/openai/codex/$TAG/README.md"
 
-SOURCE_ARCHIVE="$SOURCES_DIR/codex-$VERSION-$ARCH-unknown-linux-musl.tar.gz"
-tar -C "$WORK_DIR" -czf "$SOURCE_ARCHIVE" "codex-$VERSION"
+for ARCH in x86_64 aarch64; do
+  ASSET_BASENAME="codex-$ARCH-unknown-linux-musl"
+  LATEST_URL="https://github.com/openai/codex/releases/latest/download/$ASSET_BASENAME.tar.gz"
+  ARCHIVE="$WORK_DIR/$ASSET_BASENAME.tar.gz"
+  UNPACK_DIR="$WORK_DIR/unpack-$ARCH"
+  SOURCE_TREE="$WORK_DIR/codex-$VERSION-$ARCH"
 
-cp codex.spec "$SPECS_DIR/codex.spec"
+  echo "Downloading latest Codex release tarball for $ARCH..."
+  curl -fL --retry 3 --retry-delay 2 -o "$ARCHIVE" "$LATEST_URL"
+
+  mkdir -p "$UNPACK_DIR"
+  tar -xzf "$ARCHIVE" -C "$UNPACK_DIR"
+
+  UPSTREAM_BINARY="$UNPACK_DIR/$ASSET_BASENAME"
+  if [[ ! -x "$UPSTREAM_BINARY" ]]; then
+    echo "Expected upstream binary $ASSET_BASENAME, but it was not found." >&2
+    exit 1
+  fi
+
+  mkdir -p "$SOURCE_TREE/codex-$VERSION"
+  install -pm 0755 "$UPSTREAM_BINARY" "$SOURCE_TREE/codex-$VERSION/codex"
+  install -pm 0644 "$WORK_DIR/LICENSE" "$SOURCE_TREE/codex-$VERSION/LICENSE"
+  install -pm 0644 "$WORK_DIR/README.md" "$SOURCE_TREE/codex-$VERSION/README.md"
+
+  SOURCE_ARCHIVE="$SOURCES_DIR/codex-$VERSION-$ARCH-unknown-linux-musl.tar.gz"
+  tar -C "$SOURCE_TREE" -czf "$SOURCE_ARCHIVE" "codex-$VERSION"
+done
+
+sed "s/^%global up_version .*/%global up_version $VERSION/" \
+  codex.spec > "$SPECS_DIR/codex.spec"
 
 echo "Building SRPM for version $VERSION..."
 rpmbuild \
-  --target "$ARCH" \
   --define "_topdir $TOPDIR" \
-  --define "up_version $VERSION" \
-  --define "package_arch $ARCH" \
   -bs "$SPECS_DIR/codex.spec"
 
 echo