diff --git a/pkgs/development/compilers/uasm/default.nix b/pkgs/development/compilers/uasm/default.nix
index bd4d61d698cb..7356175c87c4 100644
--- a/pkgs/development/compilers/uasm/default.nix
+++ b/pkgs/development/compilers/uasm/default.nix
@@ -1,4 +1,10 @@
-{ lib, stdenv, fetchFromGitHub, fetchpatch }:
+{ lib
+, stdenv
+, fetchFromGitHub
+, fetchpatch
+, testVersion
+, uasm
+}:
 
 stdenv.mkDerivation rec {
   pname = "uasm";
@@ -14,9 +20,23 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-CIbHPKJa60SyJeFgF1Tux7RfJZBChhUVXR7HGa+gCtQ=";
   };
 
+  patches = lib.optionals stdenv.isDarwin [
+    (fetchpatch {
+      name = "fix-v2_55-compilation-on-macos.patch";
+      url = "https://github.com/Terraspace/UASM/commit/b50c430cc3083c7f32e288a9f64fe1cafb03091d.patch";
+      sha256 = "sha256-FGFB282LSEKtGD1cIRH+Qi5bye5Gx4xb0Ty4J03xjCU";
+    })
+  ];
+
   enableParallelBuilding = true;
 
-  makefile = "gccLinux64.mak";
+  makefile =
+    if stdenv.isDarwin then
+      "ClangOSX64.mak"
+    else
+      "gccLinux64.mak";
+
+  makeFlags = [ "CC=${stdenv.cc.targetPrefix}cc" ];
 
   installPhase = ''
     runHook preInstall
@@ -27,10 +47,16 @@ stdenv.mkDerivation rec {
     runHook postInstall
   '';
 
+  passthru.tests.version = testVersion {
+    package = uasm;
+    command = "uasm -h";
+    version = "v${version}";
+  };
+
   meta = with lib; {
     homepage = "http://www.terraspace.co.uk/uasm.html";
     description = "A free MASM-compatible assembler based on JWasm";
-    platforms = platforms.linux;
+    platforms = platforms.unix;
     maintainers = with maintainers; [ thiagokokada ];
     license = licenses.watcom;
   };
diff --git a/pkgs/tools/archivers/7zz/default.nix b/pkgs/tools/archivers/7zz/default.nix
index 144a1b275926..03c95378a0ae 100644
--- a/pkgs/tools/archivers/7zz/default.nix
+++ b/pkgs/tools/archivers/7zz/default.nix
@@ -2,23 +2,27 @@
 , lib
 , fetchurl
 
+  # Only used for x86/x86_64
 , uasm
-, useUasm ? stdenv.isLinux
+, useUasm ? stdenv.hostPlatform.isx86
 
   # RAR code is under non-free unRAR license
   # see the meta.license section below for more details
 , enableUnfree ? false
+
+  # For tests
+, _7zz
+, testVersion
 }:
 
 let
   inherit (stdenv.hostPlatform) system;
-  platformSuffix =
-    lib.optionalString useUasm {
-      aarch64-linux = "_arm64";
-      i686-linux = "_x86";
-      x86_64-linux = "_x64";
-    }.${system} or
-      (builtins.trace "7zz's ASM optimizations not available for `${system}`. Building without optimizations." "");
+  platformSuffix = {
+    aarch64-linux = "_arm64";
+    i686-linux = "_x86";
+    x86_64-linux = "_x64";
+  }.${system} or
+    (builtins.trace "`platformSuffix` not available for `${system}.` Making a generic `7zz` build." "");
 in
 stdenv.mkDerivation rec {
   pname = "7zz";
@@ -50,6 +54,10 @@ stdenv.mkDerivation rec {
   sourceRoot = "CPP/7zip/Bundles/Alone2";
 
   makeFlags =
+    [
+      "CC=${stdenv.cc.targetPrefix}cc"
+      "CXX=${stdenv.cc.targetPrefix}c++"
+    ] ++
     lib.optionals useUasm [ "MY_ASM=uasm" ] ++
     # it's the compression code with the restriction, see DOC/License.txt
     lib.optionals (!enableUnfree) [ "DISABLE_RAR_COMPRESS=true" ];
@@ -69,17 +77,13 @@ stdenv.mkDerivation rec {
     runHook postInstall
   '';
 
-  doInstallCheck = true;
-
-  installCheckPhase = ''
-    runHook preInstallCheck
-
-    $out/bin/7zz --help | grep ${version}
-
-    runHook postInstallCheck
-  '';
-
-  passthru.updateScript = ./update.sh;
+  passthru = {
+    updateScript = ./update.sh;
+    tests.version = testVersion {
+      package = _7zz;
+      command = "7zz --help";
+    };
+  };
 
   meta = with lib; {
     description = "Command line archiver utility";