diff --git a/.gitmodules b/.gitmodules
index a5162bd71..c05da4f38 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,6 +4,6 @@
 [submodule "extern/go-sectorbuilder"]
 	path = extern/go-sectorbuilder
 	url = https://github.com/filecoin-project/go-sectorbuilder
-[submodule "extern/proofs/rust-fil-proofs"]
-	path = extern/proofs/rust-fil-proofs
-	url = git@github.com:filecoin-project/rust-fil-proofs.git
+[submodule "extern/go-fil-proofs"]
+	path = extern/go-fil-proofs
+	url = git@github.com:filecoin-project/go-fil-proofs.git
diff --git a/Makefile b/Makefile
index 5a087c129..ddf325607 100644
--- a/Makefile
+++ b/Makefile
@@ -41,9 +41,9 @@ CLEAN+=build/.sector-builder-install
 
 ## PROOFS
 
-PROOFS_PATH:=extern/proofs/
+PROOFS_PATH:=extern/go-fil-proofs/
 PROOFS_DEPS:=bin/paramcache bin/paramfetch misc/parameters.json
-PROOFS_DEPS:=$(addprefix $(SECTOR_BUILDER_PATH),$(SECTOR_BUILDER_DEPS))
+PROOFS_DEPS:=$(addprefix $(PROOFS_PATH),$(PROOFS_DEPS))
 
 $(PROOFS_DEPS): build/.proofs-install ;
 
@@ -55,6 +55,16 @@ MODULES+=$(PROOFS_PATH)
 BUILD_DEPS+=build/.proofs-install
 CLEAN+=build/.proofs-install
 
+PARAM_SECTOR_SIZES:=1024 268435456
+PARAM_SECTOR_SIZES:=$(addprefix params-,$(PARAM_SECTOR_SIZES))
+
+$(PARAM_SECTOR_SIZES): extern/go-fil-proofs/bin/paramfetch extern/go-fil-proofs/misc/parameters.json
+	./extern/go-fil-proofs/bin/paramfetch -z $(subst params-,,$@) --verbose --json=./extern/go-fil-proofs/misc/parameters.json
+.PHONY: $(PARAM_SECTOR_SIZES)
+
+paramcache: extern/go-fil-proofs/bin/paramcache
+	RUST_LOG=info ./extern/go-fil-proofs/bin/paramcache
+
 # end git modules
 
 $(MODULES): build/.update-modules ;
@@ -82,6 +92,8 @@ pond: build
 clean:
 	rm -rf $(CLEAN)
 	-$(MAKE) -C $(BLS_PATH) clean
+	-$(MAKE) -C $(SECTOR_BUILDER_PATH) clean
+	-$(MAKE) -C $(PROOFS_PATH) clean
 .PHONY: clean
 
 dist-clean:
diff --git a/build/params.go b/build/params.go
index 21c102e9f..5160b2725 100644
--- a/build/params.go
+++ b/build/params.go
@@ -5,6 +5,6 @@ package build
 const UnixfsChunkSize uint64 = 1 << 20
 const UnixfsLinksPerLevel = 1024
 
-const SectorSize = 16 << 20
+const SectorSize = 268435456
 
 // TODO: Move other important consts here
diff --git a/extern/go-fil-proofs b/extern/go-fil-proofs
new file mode 160000
index 000000000..5201fa9a4
--- /dev/null
+++ b/extern/go-fil-proofs
@@ -0,0 +1 @@
+Subproject commit 5201fa9a47494a673da4322dffdf20b7bc335acb
diff --git a/extern/proofs/Makefile b/extern/proofs/Makefile
deleted file mode 100644
index 33bc829f7..000000000
--- a/extern/proofs/Makefile
+++ /dev/null
@@ -1,14 +0,0 @@
-DEPS:=bin/paramcache bin/paramfetch misc/parameters.json
-
-all: $(DEPS)
-.PHONY: all
-
-$(DEPS): .install-fil-proofs  ;
-
-.install-fil-proofs: bls-signatures
-	./install-proofs
-	@touch $@
-
-clean:
-	rm -rf $(DEPS) .install-bls
-.PHONY: clean
diff --git a/extern/proofs/bin/.keep b/extern/proofs/bin/.keep
deleted file mode 100644
index e69de29bb..000000000
diff --git a/extern/proofs/install-proofs b/extern/proofs/install-proofs
deleted file mode 100644
index f1de838ad..000000000
--- a/extern/proofs/install-proofs
+++ /dev/null
@@ -1,31 +0,0 @@
-#!/usr/bin/env bash
-
-set -Eeo pipefail
-
-# shellcheck source=install-shared.bash
-source "$(dirname "${BASH_SOURCE[0]}")/install-shared.bash"
-
-subm_dir="rust-fil-proofs"
-
-git submodule update --init --recursive ${subm_dir}
-
-if download_release_tarball tarball_path "${subm_dir}"; then
-    tmp_dir=$(mktemp -d)
-    tar -C "$tmp_dir" -xzf "$tarball_path"
-
-    mkdir -p bin
-    mkdir -p misc
-
-    cp -R "${tmp_dir}/bin/*" bin
-    cp -R "${tmp_dir}/misc/*" misc
-else
-    echo "failed to find or obtain precompiled assets for ${subm_dir}, falling back to local build"
-    build_from_source "${subm_dir}"
-
-    mkdir -p bin
-    mkdir -p misc
-
-    find "${subm_dir}" -type f -name parameters.json -exec mv -- "{}" ./misc/ \;
-    find "${subm_dir}" -type f -name paramcache -exec cp -- "{}" ./bin/ \;
-    find "${subm_dir}" -type f -name paramfetch -exec cp -- "{}" ./bin/ \;
-fi
\ No newline at end of file
diff --git a/extern/proofs/install-shared.sh b/extern/proofs/install-shared.sh
deleted file mode 100644
index 3c026bc81..000000000
--- a/extern/proofs/install-shared.sh
+++ /dev/null
@@ -1,82 +0,0 @@
-#!/usr/bin/env bash
-
-download_release_tarball() {
-    __resultvar=$1
-    __submodule_path=$2
-    __repo_name=$(echo "$__submodule_path" | cut -d '/' -f 2)
-    __release_name="${__repo_name}-$(uname)"
-    __release_sha1=$(git rev-parse @:"${__submodule_path}")
-    __release_tag="${__release_sha1:0:16}"
-    __release_tag_url="https://api.github.com/repos/filecoin-project/${__repo_name}/releases/tags/${__release_tag}"
-
-    echo "acquiring release @ ${__release_tag}"
-
-    __release_response=$(curl \
-        --retry 3 \
-        --location "$__release_tag_url")
-
-    __release_url=$(echo "$__release_response" | jq -r ".assets[] | select(.name | contains(\"${__release_name}\")) | .url")
-
-    if [[ -z "$__release_url" ]]; then
-        (>&2 echo "failed to download release (tag URL: ${__release_tag_url}, response: ${__release_response})")
-        return 1
-    fi
-
-    __tar_path="/tmp/${__release_name}_$(basename "${__release_url}").tar.gz"
-
-    if [[ ! -f "${__tar_path}" ]]; then
-        __asset_url=$(curl \
-            --head \
-            --retry 3 \
-            --header "Accept:application/octet-stream" \
-            --location \
-            --output /dev/null \
-            -w "%{url_effective}" \
-            "$__release_url")
-
-        curl --retry 3 --output "${__tar_path}" "$__asset_url"
-        if [[ $? -ne "0" ]]; then
-            (>&2 echo "failed to download release asset (tag URL: ${__release_tag_url}, asset URL: ${__asset_url})")
-            return 1
-        fi
-    fi
-
-    eval $__resultvar="'$__tar_path'"
-}
-
-build_from_source() {
-    __submodule_path=$1
-    __submodule_sha1=$(git rev-parse @:"${__submodule_path}")
-    __submodule_sha1_truncated="${__submodule_sha1:0:16}"
-
-    echo "building from source @ ${__submodule_sha1_truncated}"
-
-    if ! [ -x "$(command -v cargo)" ]; then
-        (>&2 echo 'Error: cargo is not installed.')
-        (>&2 echo 'Install Rust toolchain to resolve this problem.')
-        exit 1
-    fi
-
-    if ! [ -x "$(command -v rustup)" ]; then
-        (>&2 echo 'Error: rustup is not installed.')
-        (>&2 echo 'Install Rust toolchain installer to resolve this problem.')
-        exit 1
-    fi
-
-    if ! pushd "$__submodule_path"; then
-        (>&2 echo 'Error: could not cd into submodule')
-		exit 1
-	fi
-
-
-    cargo --version
-    cargo update
-
-    if [[ -f "./build-release.sh" ]]; then
-        ./build-release.sh "$(cat rust-toolchain)"
-    else
-        cargo build --release --all
-    fi
-
-    popd || exit 1
-}
diff --git a/extern/proofs/misc/.keep b/extern/proofs/misc/.keep
deleted file mode 100644
index e69de29bb..000000000
diff --git a/extern/proofs/rust-fil-proofs b/extern/proofs/rust-fil-proofs
deleted file mode 160000
index 8ef99ff86..000000000
--- a/extern/proofs/rust-fil-proofs
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 8ef99ff867bd0c60acbaae6b4fe4214066936c78