Merge pull request #131323 from obfusk/apktool-no-hardcode

apktool: don't hardcode (wrong) build-tools version

pkgs/development/tools/apktool/default.nix

···
 
   sourceRoot = ".";
 
-  installPhase = ''
-    install -D ${src} "$out/libexec/apktool/apktool.jar"
-    mkdir -p "$out/bin"
-    makeWrapper "${jre}/bin/java" "$out/bin/apktool" \
-        --add-flags "-jar $out/libexec/apktool/apktool.jar" \
-        --prefix PATH : "${builtins.head build-tools}/libexec/android-sdk/build-tools/28.0.3"
-  '';
+  installPhase =
+    let
+      tools = builtins.head build-tools;
+    in ''
+      install -D ${src} "$out/libexec/apktool/apktool.jar"
+      mkdir -p "$out/bin"
+      makeWrapper "${jre}/bin/java" "$out/bin/apktool" \
+          --add-flags "-jar $out/libexec/apktool/apktool.jar" \
+          --prefix PATH : "${tools}/libexec/android-sdk/build-tools/${tools.version}"
+    '';
 
   meta = with lib; {
     description = "A tool for reverse engineering Android apk files";