In reply to @matthewcroughan:defenestrate.it

Trying to update a package, but finding this

rcodesign> error[E0282]: type annotations needed for `Box<_>`
rcodesign>   --> /build/rcodesign-0.27.0-vendor.tar.gz/time/src/format_description/parse/mod.rs:83:9
rcodesign>    |
rcodesign> 83 |     let items = format_items
rcodesign>    |         ^^^^^
rcodesign> ...
rcodesign> 86 |     Ok(items.into())
rcodesign>    |              ---- type must be known at this point
rcodesign>    |
rcodesign>    = note: this is an inference error on crate `time` caused by an API change in Rust 1.80.0; update `time` to version `>=0.3.35` by calling `cargo update`

(Cross-posting from nix discord, figured I’d get a response here faster)

One would think that localSystem and crossSystem overlap horribly with the three *Platforms (buildPlatform, hostPlatform, and targetPlatform; see stage.nix or the manual). Actually, those identifiers are purposefully not used here to draw a subtle but important distinction: While the granularity of having 3 platforms is necessary to properly build packages, it is overkill for specifying the user’s intent when making a build plan or package set.

Okay, but what if that „overkill” is what I want and what I need? Can I manually specify all the 3 platforms? Does our cross infra consider that possibility?

In reply to @k900:0upti.me
Are you trying to do some sort of Canadian cross setup?

Confused why the shell file name expansion doesn't work here:

diff --git a/pkgs/applications/networking/browsers/firefox/common.nix b/pkgs/applications/networking/browsers/firefox/common.nix
index d2a52f187eb9..58e4c07e7320 100644
--- a/pkgs/applications/networking/browsers/firefox/common.nix
+++ b/pkgs/applications/networking/browsers/firefox/common.nix
@@ -164,16 +164,6 @@ assert pipewireSupport -> !waylandSupport || !webrtcSupport -> throw "${pname}:
 let
   inherit (lib) enableFeature;
 
-  mutFirstChar =
-    f: s:
-    let
-      firstChar = f (lib.substring 0 1 s);
-      rest = lib.substring 1 (-1) s;
-    in
-    firstChar + rest;
-  toTitle = s: mutFirstChar lib.toUpper s;
-  darwinAppName = toTitle binaryName + ".app";
-
   # Target the LLVM version that rustc is built with for LTO.
   llvmPackages0 = rustc.llvmPackages;
   llvmPackagesBuildBuild0 = pkgsBuildBuild.rustc.llvmPackages;
@@ -575,9 +565,9 @@ buildStdenv.mkDerivation {
 
   postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/Applications
-    cp -r dist/${binaryName}/${darwinAppName} $out/Applications
+    cp -r dist/${binaryName}/*.app $out/Applications
 
-    resourceDir=$out/Applications/${darwinAppName}/Contents/Resources
+    resourceDir=$out/Applications/*.app/Contents/Resources
 
   '' + lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     # Remove SDK cruft. FIXME: move to a separate output?
@@ -602,7 +592,7 @@ buildStdenv.mkDerivation {
   # Some basic testing
   doInstallCheck = true;
   installCheckPhase = lib.optionalString buildStdenv.hostPlatform.isDarwin ''
-    bindir=$out/Applications/${darwinAppName}/Contents/MacOS
+    bindir=$out/Applications/*.app/Contents/MacOS
   '' + lib.optionalString (!buildStdenv.hostPlatform.isDarwin) ''
     bindir=$out/bin
   '' + ''

This fails as follows:

> make[1]: Leaving directory '/private/tmp/nix-build-firefox-devedition-unwrapped-132.0b5.drv-1/firefox-132.0/objdir/browser/installer'
       > install: missing destination file operand after '/nix/store/80bzwch9jalvbpw3xgm3642hfz18hbbx-distribution.ini'
       > Try 'install --help' for more information.

Interesting that the file expansion in cp works; but not in resourceDir= variable declaration.

Confused why the shell file name expansion doesn't work here:

diff --git a/pkgs/applications/networking/browsers/firefox/common.nix b/pkgs/applications/networking/browsers/firefox/common.nix
index d2a52f187eb9..58e4c07e7320 100644
--- a/pkgs/applications/networking/browsers/firefox/common.nix
+++ b/pkgs/applications/networking/browsers/firefox/common.nix
@@ -164,16 +164,6 @@ assert pipewireSupport -> !waylandSupport || !webrtcSupport -> throw "${pname}:
 let
   inherit (lib) enableFeature;
 
-  mutFirstChar =
-    f: s:
-    let
-      firstChar = f (lib.substring 0 1 s);
-      rest = lib.substring 1 (-1) s;
-    in
-    firstChar + rest;
-  toTitle = s: mutFirstChar lib.toUpper s;
-  darwinAppName = toTitle binaryName + ".app";
-
   # Target the LLVM version that rustc is built with for LTO.
   llvmPackages0 = rustc.llvmPackages;
   llvmPackagesBuildBuild0 = pkgsBuildBuild.rustc.llvmPackages;
@@ -575,9 +565,9 @@ buildStdenv.mkDerivation {
 
   postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
     mkdir -p $out/Applications
-    cp -r dist/${binaryName}/${darwinAppName} $out/Applications
+    cp -r dist/${binaryName}/*.app $out/Applications
 
-    resourceDir=$out/Applications/${darwinAppName}/Contents/Resources
+    resourceDir=$out/Applications/*.app/Contents/Resources
 
   '' + lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
     # Remove SDK cruft. FIXME: move to a separate output?
@@ -602,7 +592,7 @@ buildStdenv.mkDerivation {
   # Some basic testing
   doInstallCheck = true;
   installCheckPhase = lib.optionalString buildStdenv.hostPlatform.isDarwin ''
-    bindir=$out/Applications/${darwinAppName}/Contents/MacOS
+    bindir=$out/Applications/*.app/Contents/MacOS
   '' + lib.optionalString (!buildStdenv.hostPlatform.isDarwin) ''
     bindir=$out/bin
   '' + ''

This fails as follows:

> make[1]: Leaving directory '/private/tmp/nix-build-firefox-devedition-unwrapped-132.0b5.drv-1/firefox-132.0/objdir/browser/installer'
       > install: missing destination file operand after '/nix/store/80bzwch9jalvbpw3xgm3642hfz18hbbx-distribution.ini'
       > Try 'install --help' for more information.

Interesting that the file expansion in cp works; but not in resourceDir= variable declaration.