explicit build env for pixi build

pixi.toml

@@ -1,11 +1,8 @@
 [workspace]
-channels = ["conda-forge"]
-name = "FANS"
+channels  = ["conda-forge"]
+name  = "FANS"
 platforms = ["linux-64", "linux-ppc64le", "linux-aarch64", "osx-arm64", "osx-64"]
-preview = ["pixi-build"]
-
-[dependencies]
-fans = { path = "." }
+preview = ["pixi-build"]
 
 [feature.dashboard.dependencies]
 python = ">=3.14.0,<3.15"
@@ -19,11 +16,11 @@ time = ">=1.9,<2"
 
 [feature.dashboard.pypi-dependencies]
 fans-dashboard = { path = "FANS_Dashboard", editable = true }
-MSUtils = {git = "https://github.com/DataAnalyticsEngineering/MSUtils.git"}
+MSUtils  = {git = "https://github.com/DataAnalyticsEngineering/MSUtils.git"}
 pyrecest = {git = "https://github.com/FlorianPfaff/pyRecEst.git"}
 
 [feature.dashboard.tasks]
-pytest = "pytest -v -s"
+pytest  = "pytest -v -s"
 precommit = "pre-commit run --all-files"
 
 [feature.dashboard.tasks.h52xdmf]
@@ -39,16 +36,18 @@ eigen = ">=3.4.0,<4"
 nlohmann_json = ">=3.12.0,<4"
 time = ">=1.9,<2"
 
-[tasks]
-test = { cmd = "pytest -v -s --from-pixi", cwd = "test/pytest", depends-on = ["test-fans"] }
-test-fans = { cmd = "./run_tests.sh -n {{n}}", args = [
- { arg = "n", default = "2" }, # Number of threads
-], cwd = "test" }
+[feature.build.dependencies]
+fans = { path = "." }
+
+[feature.build.tasks]
+test = { cmd = "pytest -v -s --from-pixi", cwd = "test/pytest", depends-on = ["test-fans"] }
+test-fans = { cmd = "./run_tests.sh -n {{n}}", args = [{ arg = "n", default = "2" }], cwd = "test" }
 
 [environments]
 default = { features = ["dashboard"]}
-dashboard = { features = ["dashboard"], no-default-feature = true }
-dev = { features = ["dev"], no-default-feature = true }
+dashboard = { features = ["dashboard"], no-default-feature = true }
+dev = { features = ["dev"], no-default-feature = true }
+build = { features = ["build", "dashboard"], no-default-feature = true }
 
 ################## Pixi build part ##################
 
@@ -60,24 +59,20 @@ version = "0.5.0"
 backend = { name = "pixi-build-cmake", version = "*" }
 
 [package.build.config]
-extra-args = [
- "-DFANS_LIBRARY_FOR_MICRO_MANAGER=ON",
- ]
-
-[workspace.target.osx-arm64.build-variants]
+extra-args = ["-DFANS_LIBRARY_FOR_MICRO_MANAGER=ON"]
 
 [workspace.target.linux-64.build-variants]
 cxx_compiler = ["clangxx"]
 
 [package.build-dependencies]
-cmake = "*"
-pybind11 = "*"
+cmake  = "*"
+pybind11  = "*"
 pkg-config = "*"
-ninja = "*"
+ninja  = "*"
 
 [package.host-dependencies]
-hdf5 = { version = "*", build = "* mpi_openmpi*" }
-fftw = { version = "*", build = "* mpi_openmpi*" }
+hdf5  = { version = "*", build = "* mpi_openmpi*" }
+fftw  = { version = "*", build = "* mpi_openmpi*" }
 openmpi-mpicxx = "*"
-eigen = "*"
-nlohmann_json = "*"
+eigen  = "*"
+nlohmann_json  = "*"