diff --git a/Elf2Mac/Elf2Mac.cc b/Elf2Mac/Elf2Mac.cc
index 4a4589b2ed..2c5a11ef29 100644
--- a/Elf2Mac/Elf2Mac.cc
+++ b/Elf2Mac/Elf2Mac.cc
@@ -181,7 +181,7 @@ int main(int argc, char *argv[])
         char tmpfile[] = "/tmp/ldscriptXXXXXX";
         int fd = mkstemp(tmpfile);
         if(fd < 0)
-            errx(EXIT_FAILURE, "can't create temp file");
+            err(EXIT_FAILURE, "can't create temp file");
 
         {
             ofstream out(tmpfile);
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 27d087c241..72cb0c95e9 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -70,6 +70,7 @@ jobs:
     submodules: true
   - script: |
       docker run -i --name nix -v`pwd`:/src nixos/nix:latest <<EOF
+        chmod 1777 /tmp
         nix-channel --add https://nixos.org/channels/nixos-21.11 nixpkgs
         nix-channel --update
         nix-build src -A m68k.retro68.samples
@@ -91,7 +92,8 @@ jobs:
     submodules: true
   - script: |
       docker run -i --name nix -v`pwd`:/src nixos/nix:latest <<EOF
-        nix-channel --add https://nixos.org/channels/nixos-21.11 nixpkgs
+        chmod 1777 /tmp
+        nix-channel --add https1://nixos.org/channels/nixos-21.11 nixpkgs
         nix-channel --update
         nix-build src -A powerpc.retro68.samples
       EOF