From f6e0762cc059f66fd6bf4b97096f630771e801b3 Mon Sep 17 00:00:00 2001
From: Christoph Heiss <christoph@c8h4.io>
Date: Fri, 6 Jun 2025 14:30:19 +0200
Subject: [PATCH 1/4] proxmox-backup-client: use correct value for RUSTC_TARGET

Signed-off-by: Christoph Heiss <christoph@c8h4.io>
---
 pkgs/by-name/pr/proxmox-backup-client/package.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/by-name/pr/proxmox-backup-client/package.nix b/pkgs/by-name/pr/proxmox-backup-client/package.nix
index e19b41c293c6..8350bd9f1684 100644
--- a/pkgs/by-name/pr/proxmox-backup-client/package.nix
+++ b/pkgs/by-name/pr/proxmox-backup-client/package.nix
@@ -118,7 +118,7 @@ rustPlatform.buildRustPackage {
   postBuild = ''
     make -C docs \
       DEB_VERSION=${version} DEB_VERSION_UPSTREAM=${version} \
-      RUSTC_TARGET=${stdenv.hostPlatform.config} \
+      RUSTC_TARGET=${stdenv.targetPlatform.rust.rustcTarget} \
       BUILD_MODE=release \
       proxmox-backup-client.1 pxar.1
   '';

From 2dc044b8f82912b85c0ae25a9f41042a5f64a2ed Mon Sep 17 00:00:00 2001
From: Christoph Heiss <christoph@c8h4.io>
Date: Fri, 6 Jun 2025 17:35:42 +0200
Subject: [PATCH 2/4] proxmox-backup-client: avoid `git` as buildInput

The build script of the `pbs-buildcfg` crate either uses `REPOID` from
the environment or runs `git rev-parse HEAD`. The latter case results in
an empty string anyway, so just fast-track it.

Signed-off-by: Christoph Heiss <christoph@c8h4.io>
---
 pkgs/by-name/pr/proxmox-backup-client/package.nix | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/pkgs/by-name/pr/proxmox-backup-client/package.nix b/pkgs/by-name/pr/proxmox-backup-client/package.nix
index 8350bd9f1684..9ac5e32ae4f4 100644
--- a/pkgs/by-name/pr/proxmox-backup-client/package.nix
+++ b/pkgs/by-name/pr/proxmox-backup-client/package.nix
@@ -10,7 +10,6 @@
   libuuid,
   acl,
   libxcrypt,
-  git,
   installShellFiles,
   sphinx,
   systemd,
@@ -149,8 +148,10 @@ rustPlatform.buildRustPackage {
 
   doCheck = false;
 
+  # pbs-buildcfg requires this set, would be the git commit id
+  REPOID = "";
+
   nativeBuildInputs = [
-    git
     pkg-config
     pkgconf
     rustPlatform.bindgenHook

From 6bc9f0fbe3ce39abface640e00fb01484d10aa22 Mon Sep 17 00:00:00 2001
From: Christoph Heiss <christoph@c8h4.io>
Date: Fri, 6 Jun 2025 17:35:48 +0200
Subject: [PATCH 3/4] proxmox-backup-client: drop unused `pkg-config`
 buildInput

Signed-off-by: Christoph Heiss <christoph@c8h4.io>
---
 pkgs/by-name/pr/proxmox-backup-client/package.nix | 2 --
 1 file changed, 2 deletions(-)

diff --git a/pkgs/by-name/pr/proxmox-backup-client/package.nix b/pkgs/by-name/pr/proxmox-backup-client/package.nix
index 9ac5e32ae4f4..24b5b2a23997 100644
--- a/pkgs/by-name/pr/proxmox-backup-client/package.nix
+++ b/pkgs/by-name/pr/proxmox-backup-client/package.nix
@@ -3,7 +3,6 @@
   fetchgit,
   fetchFromGitHub,
   rustPlatform,
-  pkg-config,
   pkgconf,
   openssl,
   fuse3,
@@ -152,7 +151,6 @@ rustPlatform.buildRustPackage {
   REPOID = "";
 
   nativeBuildInputs = [
-    pkg-config
     pkgconf
     rustPlatform.bindgenHook
     installShellFiles

From 723612485fb7466d471f5facaf34e89244fd3458 Mon Sep 17 00:00:00 2001
From: Christoph Heiss <christoph@c8h4.io>
Date: Tue, 10 Jun 2025 22:18:56 +0200
Subject: [PATCH 4/4] proxmox-backup-client: avoid some unnecessary buildInputs
 due to greedy linkage

These are actually not necessary, rustc just does greedy linkage.

Signed-off-by: Christoph Heiss <christoph@c8h4.io>
---
 .../pr/proxmox-backup-client/package.nix        | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/pkgs/by-name/pr/proxmox-backup-client/package.nix b/pkgs/by-name/pr/proxmox-backup-client/package.nix
index 24b5b2a23997..6bd8a0e52de4 100644
--- a/pkgs/by-name/pr/proxmox-backup-client/package.nix
+++ b/pkgs/by-name/pr/proxmox-backup-client/package.nix
@@ -11,9 +11,7 @@
   libxcrypt,
   installShellFiles,
   sphinx,
-  systemd,
   stdenv,
-  fetchpatch,
   versionCheckHook,
 }:
 
@@ -111,6 +109,13 @@ rustPlatform.buildRustPackage {
 
     cp ${./Cargo.lock} Cargo.lock
     rm .cargo/config.toml
+
+    # avoid some unnecessary dependendcies, stemming from greedy linkage by rustc
+    # see also upstream Makefile for similar workaround
+    mkdir -p .dep-stubs
+    echo '!<arch>' >.dep-stubs/libsystemd.a
+    echo '!<arch>' >.dep-stubs/libuuid.a
+    echo '!<arch>' >.dep-stubs/libcrypt.a
   '';
 
   postBuild = ''
@@ -145,6 +150,8 @@ rustPlatform.buildRustPackage {
     "--bin=pxar"
   ];
 
+  RUSTFLAGS = [ "-L.dep-stubs" ];
+
   doCheck = false;
 
   # pbs-buildcfg requires this set, would be the git commit id
@@ -156,15 +163,15 @@ rustPlatform.buildRustPackage {
     installShellFiles
     sphinx
   ];
+
   buildInputs = [
     openssl
     fuse3
-    libuuid
     acl
-    libxcrypt
-    systemd.dev
   ];
 
+  strictDeps = true;
+
   doInstallCheck = true;
   nativeInstallCheckInputs = [ versionCheckHook ];
   versionCheckProgramArg = "version";