Add which as part of the dependencies

[Curstantine]

Listed under their docs.

Error thrown while installing:

==> Making package: flutter 3.7.6-1 (Tue 07 Mar 2023 03:22:07 PM +0530)
==> Checking runtime dependencies...
==> Checking buildtime dependencies...
==> WARNING: Using existing $srcdir/ tree
==> Starting build()...
Downloading Linux x64 Dart SDK from Flutter engine ada363ee93b17cfe31587b5102679885cb40837e...
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  238M  100  238M    0     0   116k      0  0:34:56  0:34:56 --:--:--  129k
Building flutter tool...
Unhandled exception:
ProcessException: Failed to find "which" in the search path.
  Command: which 
#0      LocalProcessManager.runSync (package:process/src/interface/local_process_manager.dart:118:7)
#1      ErrorHandlingProcessManager.runSync.<anonymous closure> (package:flutter_tools/src/base/error_handling_io.dart:718:24)
#2      _runSync (package:flutter_tools/src/base/error_handling_io.dart:600:14)
#3      ErrorHandlingProcessManager.runSync (package:flutter_tools/src/base/error_handling_io.dart:717:12)
#4      _PosixUtils._which (package:flutter_tools/src/base/os.dart:209:50)
#5      OperatingSystemUtils.whichAll (package:flutter_tools/src/base/os.dart:101:43)
#6      AndroidSdk.locateAndroidSdk.findAndroidHomeDir (package:flutter_tools/src/android/android_sdk.dart:122:46)
#7      AndroidSdk.locateAndroidSdk (package:flutter_tools/src/android/android_sdk.dart:146:36)
#8      AppContext._generateIfNecessary.<anonymous closure> (package:flutter_tools/src/base/context.dart:104:42)
#9      _LinkedHashMapMixin.putIfAbsent (dart:collection-patch/compact_hash.dart:535:23)
#10     AppContext._generateIfNecessary (package:flutter_tools/src/base/context.dart:92:20)
#11     AppContext.get (package:flutter_tools/src/base/context.dart:121:32)
#12     androidSdk (package:flutter_tools/src/globals.dart:63:39)
#13     generateCommands (package:flutter_tools/executable.dart:173:25)
#14     main.<anonymous closure> (package:flutter_tools/executable.dart:93:11)
#15     run.<anonymous closure> (package:flutter_tools/runner.dart:50:13)
<asynchronous suspension>
#16     AppContext.run.<anonymous closure> (package:flutter_tools/src/base/context.dart:150:19)
<asynchronous suspension>
#17     main (package:flutter_tools/executable.dart:91:3)
<asynchronous suspension>
==> ERROR: A failure occurred in build().
    Aborting...
error: failed to build 'flutter-3.7.6-1': 

[frealgagu]

According to standards and wiki:

Arch_User_Repository

You need to have already installed base-devel meta package to build any package.