Oh my god.. At the bottom of the page:

Zephyr is an English name for the Latin Zephyrus, the ancient Greek god of the west wind.

error: Cannot build '/nix/store/qmximns6m4rb6zm8ayhpmrdvm2j5006p-aws-sdk-java-v2-4b4fafe.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/1d3k2ks8h4ky672nn9q8prx2wrnflxc6-aws-sdk-java-v2-4b4fafe
       Last 18 log lines:
       > exporting https://android.googlesource.com/platform/external/aws-sdk-java-v2 (rev 4b4fafefcbed63e78902f1bcdce7907908c908d8) into /nix/store/1d3k2ks8h4ky672nn9q8prx2wrnflxc6-aws-sdk-java-v2-4b4fafe
       > Git LFS initialized.
       > Initialized empty Git repository in /nix/store/1d3k2ks8h4ky672nn9q8prx2wrnflxc6-aws-sdk-java-v2-4b4fafe/.git/
       > error: RPC failed; HTTP 429 curl 22 The requested URL returned error: 429
       > fatal: expected flush after ref listing
       > error: RPC failed; HTTP 429 curl 22 The requested URL returned error: 429
       > fatal: expected flush after ref listing

error: build of '/nix/store/zx5j26wynm41bwkjr21hdkcy222lgsx7-device=xiaomi=sdm710-common-patched.drv' on 'ssh-ng://nix-ssh@swordfish' failed: Cannot build '/nix/store/zx5j26wynm41bwkjr21hdkcy222lgsx7-device=xiaomi=sdm710-common-patched.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/66wblg9v5dwwbqky9fgn810c3ldslshh-device=xiaomi=sdm710-common-patched
       Last 6 log lines:
       > Applying /nix/store/c1qqsffljczccv1641vn87a7al2xmpyl-system_partition_size.patch
       > patching file BoardConfigCommon.mk
       > Reversed (or previously applied) patch detected!  Assume -R? [n]
       > Apply anyway? [n]
       > Skipping patch.
       > 1 out of 1 hunk ignored -- saving rejects to file BoardConfigCommon.mk.rej
       For full logs, run:
         nix log /nix/store/zx5j26wynm41bwkjr21hdkcy222lgsx7-device=xiaomi=sdm710-common-patched.drv

  source.dirs."device/xiaomi/sdm710-common".patches = [
    ./system_partition_size.patch
  ];

diff --git a/BoardConfigCommon.mk b/BoardConfigCommon.mk
index d31ebaf..e655ca2 100644
--- a/BoardConfigCommon.mk
+++ b/BoardConfigCommon.mk
@@ -108,19 +108,6 @@ BOARD_SUPER_PARTITION_VENDOR_DEVICE_SIZE := 1610612736
 BOARD_SUPER_PARTITION_CUST_DEVICE_SIZE := 1073741824
 BOARD_SUPER_PARTITION_METADATA_DEVICE := system
 
-# Partitions - reserved size
-ifneq ($(WITH_GMS),true)
-$(foreach p, $(call to-upper, $(SSI_PARTITIONS)), \
-    $(eval BOARD_$(p)IMAGE_EXTFS_INODE_COUNT := -1))
-SSI_PARTITIONS_RESERVED_SIZE := 1205862400
-else
-SSI_PARTITIONS_RESERVED_SIZE := 30720000
-endif
-$(foreach p, $(call to-upper, $(SSI_PARTITIONS)), \
-    $(eval BOARD_$(p)IMAGE_PARTITION_RESERVED_SIZE := $(SSI_PARTITIONS_RESERVED_SIZE)))
-$(foreach p, $(call to-upper, $(TREBLE_PARTITIONS)), \
-    $(eval BOARD_$(p)IMAGE_PARTITION_RESERVED_SIZE := 30720000))
-
 # Platform
 BOARD_VENDOR := xiaomi
 BOARD_USES_QCOM_HARDWARE := true