diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 69df1784..03a3f456 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -73,6 +73,16 @@ jobs:
         if: matrix.platform != 'amd64'
         uses: docker/setup-qemu-action@v3
 
+      - name: Set docker arch
+        run: |
+          platform=${{ matrix.platform }}
+          if [[ $platform == arm64v8 ]]; then
+            platform=arm64
+          elif [[ $platform == arm32v7 ]]; then
+            platform=arm
+          fi
+          echo "DOCKER_PLATFORM=$platform" >> $GITHUB_ENV
+
       - uses: actions/download-artifact@v3
         with:
           name: patchelf
@@ -100,7 +110,7 @@ jobs:
           else
               ENTRYPOINT=
           fi
-          docker run -e CXXFLAGS -v $(pwd):/gha ${{ matrix.platform }}/alpine:edge ${ENTRYPOINT} sh -ec "cd /gha && sh ./build.sh"
+          docker run --platform "$DOCKER_PLATFORM" -e CXXFLAGS -v $(pwd):/gha ${{ matrix.platform }}/alpine:edge ${ENTRYPOINT} sh -ec "cd /gha && sh ./build.sh"
       - name: Check binaries
         run: |
           cat <<EOF > check.sh
@@ -109,7 +119,7 @@ jobs:
           tar -xf ./dist/patchelf-*-*.tar.gz
           ./bin/patchelf --version
           EOF
-          docker run -v $(pwd):/gha ${{ matrix.platform }}/debian:unstable-slim sh -ec "cd /gha && sh ./check.sh"
+          docker run --platform "$DOCKER_PLATFORM" -v $(pwd):/gha ${{ matrix.platform }}/debian:unstable-slim sh -ec "cd /gha && sh ./check.sh"
       - uses: actions/upload-artifact@v3
         with:
           name: patchelf
diff --git a/flake.lock b/flake.lock
index 1e068201..eda6a5f7 100644
--- a/flake.lock
+++ b/flake.lock
@@ -2,17 +2,18 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1672057183,
-        "narHash": "sha256-GN7/10DNNvs1FPj9tlZA2qgNdFuYKKuS3qlHTqAxasQ=",
+        "lastModified": 1731763621,
+        "narHash": "sha256-ddcX4lQL0X05AYkrkV2LMFgGdRvgap7Ho8kgon3iWZk=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "b139e44d78c36c69bcbb825b20dbfa51e7738347",
+        "rev": "c69a9bffbecde46b4b939465422ddc59493d3e4d",
         "type": "github"
       },
       "original": {
-        "id": "nixpkgs",
+        "owner": "NixOS",
         "ref": "nixpkgs-unstable",
-        "type": "indirect"
+        "repo": "nixpkgs",
+        "type": "github"
       }
     },
     "root": {
diff --git a/flake.nix b/flake.nix
index 471a31b9..84c6f6db 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,7 +1,7 @@
 {
   description = "A tool for modifying ELF executables and libraries";
 
-  inputs.nixpkgs.url = "nixpkgs/nixpkgs-unstable";
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
 
   outputs = { self, nixpkgs }:
 
@@ -36,6 +36,11 @@
             versionSuffix = ""; # obsolete
             src = self;
             preAutoconf = "echo ${version} > version";
+
+            # portable configure shouldn't have a shebang pointing to the nix store
+            postConfigure = ''
+              sed -i '1s|^.*$|#!/bin/sh|' ./configure
+            '';
             postDist = ''
               cp README.md $out/
               echo "doc readme $out/README.md" >> $out/nix-support/hydra-build-products