flake: cleanup tmpdir management

flake.lock

@@ -18,11 +18,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1702233072,
-        "narHash": "sha256-H5G2wgbim2Ku6G6w+NSaQaauv6B6DlPhY9fMvArKqRo=",
+        "lastModified": 1703467016,
+        "narHash": "sha256-/5A/dNPhbQx/Oa2d+Get174eNI3LERQ7u6WTWOlR1eQ=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "781e2a9797ecf0f146e81425c822dca69fe4a348",
+        "rev": "d02d818f22c777aa4e854efc3242ec451e5d462a",
         "type": "github"
       },
       "original": {

flake.nix

@@ -21,7 +21,7 @@
               echo ${variant}
 
               # kicad-cli requires the use of $HOME
-              TMP_DIR="$(pwd)/$(mktemp -d tmp.XXXX)"
+              TMP_DIR="$(mktemp --tmpdir -d kicad-kirdy.XXXXXXX)"
               export HOME=$TMP_DIR
 
               SCH=kirdy_LD_adapter_${variant}.kicad_sch
@@ -48,8 +48,6 @@
               kicad-cli pcb export drill $PCB -u mm --generate-map --map-format gerberx2 -o ./$PREFIX"_gerber_drill"/
 
               zip -r -j $PREFIX"_gerber_drill" $PREFIX"_gerber_drill"
-
-              rm -r $TMP_DIR
             '';
 
             installPhase = ''
@@ -72,7 +70,7 @@
 
             buildPhase = ''
               # kicad-cli requires the use of $HOME
-              TMP_DIR="$(pwd)/$(mktemp -d tmp.XXXX)"
+              TMP_DIR="$(mktemp --tmpdir -d kicad-kirdy.XXXXXXX)"
               export HOME=$TMP_DIR
 
               PCB=kirdy_LD_adapter_copper_plate.kicad_pcb
@@ -83,8 +81,6 @@
 
               export KICAD7_3DMODEL_DIR=${pkgs.kicad.libraries.packages3d}/share/kicad/3dmodels
               kicad-cli pcb export step $PCB --subst-models --force -o $PREFIX.step
-
-              rm -r $TMP_DIR
             '';
 
             installPhase = ''