CI: add uploading `nix develop` to cachix (#2940)

* upload nix develop cache

* nix develop remove unused dependencies

.github/workflows/lock.yml

@@ -41,6 +41,9 @@ jobs:
     - name: simple run pwndbg
       run: TERM=xterm-256color ./result/bin/pwndbg <<< 'exit'
 
+    - name: build develop environment
+      run: nix develop --accept-flake-config
+
     - name: configure cache
       if: github.ref == 'refs/heads/dev'
       uses: cachix/cachix-action@ad2ddac53f961de1989924296a1f236fcfbaa4fc  # v15
@@ -48,11 +51,7 @@ jobs:
         name: pwndbg
         authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
         signingKey: '${{ secrets.CACHIX_SIGNING_KEY }}'
-        skipPush: true
-
-    - name: upload cache
-      if: github.ref == 'refs/heads/dev'
-      run: cachix push -v pwndbg ./result
+        skipPush: false
 
   check_release_build-lldb:
     strategy:
@@ -79,6 +78,9 @@ jobs:
     - name: simple run pwndbg
       run: TERM=xterm-256color ./result/bin/pwndbg-lldb <<< 'exit'
 
+    - name: build develop environment
+      run: nix develop --accept-flake-config
+
     - name: configure cache
       if: github.ref == 'refs/heads/dev'
       uses: cachix/cachix-action@ad2ddac53f961de1989924296a1f236fcfbaa4fc  # v15
@@ -86,12 +88,7 @@ jobs:
         name: pwndbg
         authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
         signingKey: '${{ secrets.CACHIX_SIGNING_KEY }}'
-        skipPush: true
-
-    - name: upload cache
-      if: github.ref == 'refs/heads/dev'
-      run: cachix push -v pwndbg ./result
-
+        skipPush: false
 
   lock_flake:
     runs-on: ubuntu-latest

nix/devshell.nix

@@ -76,19 +76,6 @@ in
       }
       ++ [
         jemalloc-static
-        # from qemu-tests.sh
-        (pkgs.writeShellScriptBin "gdb-multiarch" ''
-          exec ${lib.getBin pkgs.gdb}/bin/gdb "$@"
-        '')
-        pkgs.pkgsCross.aarch64-multiplatform.buildPackages.binutils
-        pkgs.pkgsCross.riscv64.buildPackages.binutils
-        pkgs.pkgsCross.mips-linux-gnu.buildPackages.binutils
-        (pkgs.writeShellScriptBin "aarch64-linux-gnu-gcc" ''
-          exec ${lib.getBin pkgs.pkgsCross.aarch64-multiplatform.buildPackages.gcc}/bin/aarch64-unknown-linux-gnu-gcc "$@"
-        '')
-        (pkgs.writeShellScriptBin "riscv64-linux-gnu-gcc" ''
-          exec ${lib.getBin pkgs.pkgsCross.riscv64.buildPackages.gcc}/bin/riscv64-unknown-linux-gnu-gcc "$@"
-        '')
         pyEnv
         (pkgs.writeShellScriptBin "pwndbg" ''
           exec ${lib.getBin pkgs.gdb}/bin/gdb --quiet --command="$REPO_ROOT/gdbinit.py" $@