1 files changed, 15 insertions, 1 deletions
diff --git a/pkgs/build-support/testers/default.nix b/pkgs/build-support/testers/default.nix
index 1d1effa3730..8b79843b833 100644
--- a/pkgs/build-support/testers/default.nix
+++ b/pkgs/build-support/testers/default.nix
@@ -1,4 +1,18 @@
-{ pkgs, lib, callPackage }:
+{ pkgs, lib, callPackage, runCommand }:
+# Documentation is in doc/builders/testers.chapter.md
 {
   testEqualDerivation = callPackage ./test-equal-derivation.nix { };
+
+  testVersion =
+    { package,
+      command ? "${package.meta.mainProgram or package.pname or package.name} --version",
+      version ? package.version,
+    }: runCommand "${package.name}-test-version" { nativeBuildInputs = [ package ]; meta.timeout = 60; } ''
+      if output=$(${command} 2>&1); then
+        grep -Fw "${version}" - <<< "$output"
+        touch $out
+      else
+        echo "$output" >&2 && exit 1
+      fi
+    '';
 }