1 files changed, 5 insertions, 2 deletions
diff --git a/pkgs/test/make-binary-wrapper/env.c b/pkgs/test/make-binary-wrapper/env.c
index 89f1f496b3497..a1b50b1c3630c 100644
--- a/pkgs/test/make-binary-wrapper/env.c
+++ b/pkgs/test/make-binary-wrapper/env.c
@@ -6,11 +6,14 @@
 
 #include <unistd.h>
 #include <stdlib.h>
+#include <stdio.h>
+
+#define assert_success(e) do { if ((e) < 0) { perror(#e); exit(1); } } while (0)
 
 int main(int argc, char **argv) {
     putenv("PART1=HELLO");
-    setenv("PART2", "WORLD", 0);
-    unsetenv("SOME_OTHER_VARIABLE");
+    assert_success(setenv("PART2", "WORLD", 0));
+    assert_success(unsetenv("SOME_OTHER_VARIABLE"));
     putenv("PART3=\"!!\n\"");
     argv[0] = "/hello/world";
     return execv("/hello/world", argv);