build-support/lib/cmake: fix CMAKE_SYSTEM_NAME in cygwin cross (#468185)

2025-12-05 19:51:10 +00:00
parent 924d581a45 1a9ad281e4
commit 2c3051a809
1 changed files with 3 additions and 1 deletions
@@ -12,7 +12,9 @@ let
    [
      "-DCMAKE_SYSTEM_NAME=${
        findFirst isString "Generic" (
-          optional (!stdenv.hostPlatform.isRedox) stdenv.hostPlatform.uname.system
+          # uname -s is CYGWIN_NT[...] on cygwin, but cmake expects CYGWIN
+          optional (stdenv.hostPlatform.isCygwin) "CYGWIN"
+          ++ optional (!stdenv.hostPlatform.isRedox) stdenv.hostPlatform.uname.system
        )
      }"
    ]