diff --git a/install b/install
index b0716d532082..87980d343ff4 100755
--- a/install
+++ b/install
@@ -234,94 +234,15 @@ check_version() {
     fi
 }
 
-unbuffered_sed() {
-    if echo | sed -u -e "" >/dev/null 2>&1; then
-        sed -nu "$@"
-    elif echo | sed -l -e "" >/dev/null 2>&1; then
-        sed -nl "$@"
-    else
-        local pad="$(printf "\n%512s" "")"
-        sed -ne "s/$/\\${pad}/" "$@"
-    fi
-}
-
-print_progress() {
-    local bytes="$1"
-    local length="$2"
-    [ "$length" -gt 0 ] || return 0
-
-    local width=50
-    local percent=$(( bytes * 100 / length ))
-    [ "$percent" -gt 100 ] && percent=100
-    local on=$(( percent * width / 100 ))
-    local off=$(( width - on ))
-
-    local filled=$(printf "%*s" "$on" "")
-    filled=${filled// /■}
-    local empty=$(printf "%*s" "$off" "")
-    empty=${empty// /･}
-
-    printf "\r${ORANGE}%s%s %3d%%${NC}" "$filled" "$empty" "$percent" >&4
-}
-
-download_with_progress() {
+download_file() {
     local url="$1"
     local output="$2"
 
     if [ -t 2 ]; then
-        exec 4>&2
+        curl --fail --location --progress-bar --output "$output" "$url"
     else
-        exec 4>/dev/null
+        curl --fail --location --silent --show-error --output "$output" "$url"
     fi
-
-    local tmp_dir=${TMPDIR:-/tmp}
-    local basename="${tmp_dir}/opencode_install_$$"
-    local tracefile="${basename}.trace"
-
-    rm -f "$tracefile"
-    mkfifo "$tracefile"
-
-    # Hide cursor
-    printf "\033[?25l" >&4
-
-    trap "trap - RETURN; rm -f \"$tracefile\"; printf '\033[?25h' >&4; exec 4>&-" RETURN
-
-    (
-        curl --trace-ascii "$tracefile" -s -L -o "$output" "$url"
-    ) &
-    local curl_pid=$!
-
-    unbuffered_sed \
-        -e 'y/ACDEGHLNORTV/acdeghlnortv/' \
-        -e '/^0000: content-length:/p' \
-        -e '/^<= recv data/p' \
-        "$tracefile" | \
-    {
-        local length=0
-        local bytes=0
-
-        while IFS=" " read -r -a line; do
-            [ "${#line[@]}" -lt 2 ] && continue
-            local tag="${line[0]} ${line[1]}"
-
-            if [ "$tag" = "0000: content-length:" ]; then
-                length="${line[2]}"
-                length=$(echo "$length" | tr -d '\r')
-                bytes=0
-            elif [ "$tag" = "<= recv" ]; then
-                local size="${line[3]}"
-                bytes=$(( bytes + size ))
-                if [ "$length" -gt 0 ]; then
-                    print_progress "$bytes" "$length"
-                fi
-            fi
-        done
-    }
-
-    wait $curl_pid
-    local ret=$?
-    echo "" >&4
-    return $ret
 }
 
 download_and_install() {
@@ -329,10 +250,7 @@ download_and_install() {
     local tmp_dir="${TMPDIR:-/tmp}/opencode_install_$$"
     mkdir -p "$tmp_dir"
 
-    if [[ "$os" == "windows" ]] || ! [ -t 2 ] || ! download_with_progress "$url" "$tmp_dir/$filename"; then
-        # Fallback to standard curl on Windows, non-TTY environments, or if custom progress fails
-        curl -# -L -o "$tmp_dir/$filename" "$url"
-    fi
+    download_file "$url" "$tmp_dir/$filename"
 
     if [ "$os" = "linux" ]; then
         tar -xzf "$tmp_dir/$filename" -C "$tmp_dir"