Swift SPM Package minimum iOS version not propagating - ios

Question

I am creating a simple Library Swift Package:
import PackageDescription
let package = Package(
name: "dpo-sdk-spm",
platforms: [
.iOS(.v10),
],
products: [
// Products define the executables and libraries produced by a package, and make them visible to other packages.
.library(
name: "dpo-sdk-spm",
targets: ["dpo-sdk-spm"]),
],
dependencies: [
// Dependencies declare other packages that this package depends on.
// .package(url: /* package url */, from: "1.0.0"),
.package(url: "https://github.com/Alamofire/Alamofire.git", .upToNextMajor(from: "5.2.0"))
],
targets: [
// Targets are the basic building blocks of a package. A target can define a module or a test suite.
// Targets can depend on other targets in this package, and on products in packages which this package depends on.
.target(
name: "dpo-sdk-spm",
dependencies: ["Alamofire"]),
.testTarget(
name: "dpo-sdk-spmTests",
dependencies: ["dpo-sdk-spm"]),
]
)
I specifically did not create a project file, as working with that in source control is a pain - and its not required to develop a library that will be consumed in a iOS App, that will have the necessary build settings etc. My Library was created using swift package init --type library and here is the structure:
I specified under the platforms node iOS V10, then pushed the package to my git repo. I added my git account to Xcode, created a App project, added my package via Xcode 11's built in SPM and had no issues, however trying to build I got:
Showing All Messages The package product 'Alamofire' requires minimum platform version 10.0 for the iOS platform, but this target supports 8.0
I did specify the platform and version in my Package.swift, why is the build pipeline ignoring this variable?