diff --git a/.github/workflows/formal.yml b/.github/workflows/formal.yml
index 74f7ddf5..9cc2a62d 100644
--- a/.github/workflows/formal.yml
+++ b/.github/workflows/formal.yml
@@ -84,7 +84,7 @@ jobs:
         pull: >-
           ghdl/yosys
           pkg/z3
-          pkg/symbiyosys
+          pkg/sby
           pkg/yices2
           pkg/boolector
           pkg/cvc
diff --git a/.github/workflows/symbiyosys.yml b/.github/workflows/sby.yml
similarity index 93%
rename from .github/workflows/symbiyosys.yml
rename to .github/workflows/sby.yml
index 3e537bb6..a7a36daa 100644
--- a/.github/workflows/symbiyosys.yml
+++ b/.github/workflows/sby.yml
@@ -20,7 +20,7 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 
-name: 'symbiyosys'
+name: 'sby'
 
 on:
   pull_request:
@@ -29,16 +29,16 @@ on:
     - cron: '0 0 * * 5'
   workflow_dispatch:
   repository_dispatch:
-    types: [ symbiyosys ]
+    types: [ sby ]
 
 env:
   DOCKER_BUILDKIT: 1
 
 jobs:
-  symbiyosys:
+  sby:
     uses: ./.github/workflows/common.yml
     with:
-      key: symbiyosys
+      key: sby
       skip-release: ${{ github.event_name == 'pull_request' }}
     secrets:
       gcr_token: '${{ secrets.GCR_JSON_KEY }}'
diff --git a/.todo/tasks.py b/.todo/tasks.py
index f6f20eeb..f1b148e3 100644
--- a/.todo/tasks.py
+++ b/.todo/tasks.py
@@ -20,7 +20,7 @@
 #    "synth:beta",
 #    "synth:formal",
 #
-#    "synth:symbiyosys",
+#    "synth:sby",
 #
 #    "build:base",
 #    "build:build",
@@ -42,7 +42,7 @@ def task(name, args, dry_run=False):
 
         "formal": ("cache", "formal"),
 
-        "symbiyosys": ("synth", "symbiyosys"),
+        "sby": ("synth", "sby"),
 
         "vunit": map( lambda backend: map( lambda tag: ("vunit", tag), [backend, "%s-master" % backend]
         ), ["mcode", "llvm", "gcc"]
@@ -82,7 +82,7 @@ def b_s(tag):
             return ("synth", tag, "yosys", {
                 "target": "yosys"
             })
-        if tag == "symbiyosys":
+        if tag == "sby":
             return ("synth", tag, "synth_formal", {
                 "args": [
                     'IMAGE=ghdl/synth:yosys'
diff --git a/debian-bookworm/symbiyosys.dockerfile b/debian-bookworm/sby.dockerfile
similarity index 82%
rename from debian-bookworm/symbiyosys.dockerfile
rename to debian-bookworm/sby.dockerfile
index 48ae912b..989d8cd0 100644
--- a/debian-bookworm/symbiyosys.dockerfile
+++ b/debian-bookworm/sby.dockerfile
@@ -36,11 +36,11 @@ RUN apt-get update -qq \
  && update-ca-certificates  \
  && rm -rf /var/lib/apt/lists/*
 
-RUN mkdir /tmp/symbiyosys && cd /tmp/symbiyosys \
- && curl -fsSL https://codeload.github.com/YosysHQ/SymbiYosys/tar.gz/main | tar xzf - --strip-components=1 \
- && make DESTDIR=/opt/symbiyosys install
+RUN mkdir /tmp/sby && cd /tmp/sby \
+ && curl -fsSL https://codeload.github.com/YosysHQ/sby/tar.gz/main | tar xzf - --strip-components=1 \
+ && make DESTDIR=/opt/sby install
 
 #---
 
 FROM scratch
-COPY --from=build /opt/symbiyosys /symbiyosys
+COPY --from=build /opt/sby /sby
diff --git a/debian-bullseye/formal.dockerfile b/debian-bullseye/formal.dockerfile
index 32496b94..046817e3 100644
--- a/debian-bullseye/formal.dockerfile
+++ b/debian-bullseye/formal.dockerfile
@@ -26,12 +26,12 @@ ARG REGISTRY='gcr.io/hdl-containers/debian/bullseye'
 
 # WORKAROUND: this is required because 'COPY --from' does not support ARGs
 FROM $REGISTRY/pkg/z3 AS pkg-z3
-FROM $REGISTRY/pkg/symbiyosys AS pkg-symbiyosys
+FROM $REGISTRY/pkg/sby AS pkg-sby
 
 FROM $REGISTRY/ghdl/yosys AS min
 
 COPY --from=pkg-z3 /z3 /
-COPY --from=pkg-symbiyosys /symbiyosys /
+COPY --from=pkg-sby /sby /
 
 RUN apt-get update -qq \
  && DEBIAN_FRONTEND=noninteractive apt-get -y install --no-install-recommends \
diff --git a/debian-bullseye/symbiyosys.dockerfile b/debian-bullseye/sby.dockerfile
similarity index 82%
rename from debian-bullseye/symbiyosys.dockerfile
rename to debian-bullseye/sby.dockerfile
index 52b47561..399c12ec 100644
--- a/debian-bullseye/symbiyosys.dockerfile
+++ b/debian-bullseye/sby.dockerfile
@@ -36,11 +36,11 @@ RUN apt-get update -qq \
  && update-ca-certificates  \
  && rm -rf /var/lib/apt/lists/*
 
-RUN mkdir /tmp/symbiyosys && cd /tmp/symbiyosys \
- && curl -fsSL https://codeload.github.com/YosysHQ/SymbiYosys/tar.gz/main | tar xzf - --strip-components=1 \
- && make DESTDIR=/opt/symbiyosys install
+RUN mkdir /tmp/sby && cd /tmp/sby \
+ && curl -fsSL https://codeload.github.com/YosysHQ/sby/tar.gz/main | tar xzf - --strip-components=1 \
+ && make DESTDIR=/opt/sby install
 
 #---
 
 FROM scratch
-COPY --from=build /opt/symbiyosys /symbiyosys
+COPY --from=build /opt/sby /sby
diff --git a/doc/conf.py b/doc/conf.py
index d6829fd5..8be97626 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -193,7 +193,7 @@ def OCIImageShield(image):
         "cvc",
         "pono",
         "superprove",
-        "symbiyosys",
+        "sby",
         "yices2",
         "z3",
     ],
diff --git a/doc/graph/formal.dot b/doc/graph/formal.dot
index 09441a94..80e252f8 100644
--- a/doc/graph/formal.dot
+++ b/doc/graph/formal.dot
@@ -29,10 +29,10 @@ digraph G {
   { node [shape=note, color=dodgerblue, fontcolor=dodgerblue]
     d_boolector   [label="boolector"];
     d_pono        [label="pono"];
-    d_cvc        [label="cvc"];
+    d_cvc         [label="cvc"];
     d_formal      [label="formal"];
     d_superprove  [label="superprove"];
-    d_symbiyosys  [label="symbiyosys"];
+    d_sby         [label="sby"];
     d_yices2      [label="yices2"];
     d_z3          [label="z3"];
   }
@@ -50,7 +50,7 @@ digraph G {
       "pkg/cvc"
       "pkg/pono"
       "pkg/superprove"
-      "pkg/symbiyosys"
+      "pkg/sby"
       "pkg/yices2"
       "pkg/z3"
     }
@@ -132,18 +132,18 @@ digraph G {
     "pkg/superprove" -> "t_pkg/superprove";
   }
 
-  subgraph cluster_symbiyosys {
+  subgraph cluster_sby {
     { rank=same
       node [shape=cylinder, color=grey, fontcolor=grey]
-      "p_symbiyosys_scratch" [label="scratch"]
-      "p_symbiyosys_build/base" [label="build/base"]
+      "p_sby_scratch" [label="scratch"]
+      "p_sby_build/base" [label="build/base"]
     }
 
-    d_symbiyosys -> "pkg/symbiyosys" [style=dotted];
+    d_sby -> "pkg/sby" [style=dotted];
 
-    "t_pkg/symbiyosys" [shape=folder, color=red, fontcolor=red, label="symbiyosys.pkg"];
+    "t_pkg/sby" [shape=folder, color=red, fontcolor=red, label="sby.pkg"];
 
-    "pkg/symbiyosys" -> "t_pkg/symbiyosys";
+    "pkg/sby" -> "t_pkg/sby";
   }
 
   subgraph cluster_yices2 {
@@ -181,7 +181,7 @@ digraph G {
       "p_formal_cvc" [label="pkg/cvc"]
       "p_formal_ghdl" [label="ghdl/yosys"]
       "p_formal_pono" [label="pkg/pono"]
-      "p_formal_symbiyosys" [label="pkg/symbiyosys"]
+      "p_formal_sby" [label="pkg/sby"]
       "p_formal_superprove" [label="pkg/superprove"]
       "p_formal_z3" [label="pkg/z3"]
       "p_formal_yices2" [label="pkg/yices2"]
@@ -210,7 +210,7 @@ digraph G {
     d_cvc
     d_pono
     d_superprove
-    d_symbiyosys
+    d_sby
     d_yices2
     d_z3
   }
@@ -224,7 +224,7 @@ digraph G {
   "scratch" -> "p_cvc_scratch" -> d_cvc;
 
   "ghdl/yosys" -> "p_formal_ghdl" -> d_formal;
-  "pkg/symbiyosys" -> "p_formal_symbiyosys" -> d_formal;
+  "pkg/sby" -> "p_formal_sby" -> d_formal;
   "pkg/boolector" -> "p_formal_boolector" -> d_formal;
   "pkg/cvc" -> "p_formal_cvc" -> d_formal;
   "pkg/pono" -> "p_formal_pono" -> d_formal;
@@ -235,8 +235,8 @@ digraph G {
   "build/build" -> "p_pono_build/build" -> d_pono;
   "scratch" -> "p_pono_scratch" -> d_pono;
 
-  "build/base" -> "p_symbiyosys_build/base" -> d_symbiyosys;
-  "scratch" -> "p_symbiyosys_scratch" -> d_symbiyosys;
+  "build/base" -> "p_sby_build/base" -> d_sby;
+  "scratch" -> "p_sby_scratch" -> d_sby;
 
   "build/build" -> "p_superprove_build/build" -> d_superprove;
   "scratch" -> "p_superprove_scratch" -> d_superprove;
@@ -255,14 +255,14 @@ digraph G {
     "p_formal_ghdl" -> "formal/min" -> "formal" -> "formal/all";
     "p_pono_scratch" -> "pkg/pono";
     "p_superprove_scratch" -> "pkg/superprove";
-    "p_symbiyosys_scratch" -> "pkg/symbiyosys";
+    "p_sby_scratch" -> "pkg/sby";
     "p_yices2_scratch" -> "pkg/yices2";
     "p_z3_scratch" -> "pkg/z3";
   }
 
   { edge [style=dashed, color=grey]
     {
-      "p_formal_symbiyosys",
+      "p_formal_sby",
       "p_formal_z3"
     } -> "formal/min";
 
diff --git a/doc/graph/graph.dot b/doc/graph/graph.dot
index e27a4124..6463ce05 100644
--- a/doc/graph/graph.dot
+++ b/doc/graph/graph.dot
@@ -100,7 +100,7 @@ digraph G {
       "pkg/prjoxide"
       "pkg/prjtrellis"
       "pkg/superprove"
-      "pkg/symbiyosys"
+      "pkg/sby"
       "pkg/yices2"
       "pkg/yosys"
       "pkg/verible"
@@ -298,7 +298,7 @@ digraph G {
   subgraph cluster_formal {
     label = "Formal";
     m_formal -> {
-      "pkg/symbiyosys"
+      "pkg/sby"
       "pkg/boolector"
       "pkg/cvc"
       "pkg/pono"
diff --git a/doc/tools.yml b/doc/tools.yml
index 7fcb723b..ccf19c70 100644
--- a/doc/tools.yml
+++ b/doc/tools.yml
@@ -316,10 +316,10 @@ superprove:
 
 #---
 
-symbiyosys:
+sby:
   src: true
   pkg:
-    - 'symbiyosys'
+    - 'sby'
   in:
     - 'formal/min'
     - 'formal'
diff --git a/test/symbiyosys.pkg.sh b/test/sby.pkg.sh
similarity index 100%
rename from test/symbiyosys.pkg.sh
rename to test/sby.pkg.sh
diff --git a/utils/pyHDLC/config.yml b/utils/pyHDLC/config.yml
index 17875db7..c8dea6be 100644
--- a/utils/pyHDLC/config.yml
+++ b/utils/pyHDLC/config.yml
@@ -73,7 +73,7 @@ defaults:
     pkg/cvc:        *EmptyTarget
     pkg/pono:       *EmptyTarget
     pkg/superprove: *EmptyTarget
-    pkg/symbiyosys: *EmptyTarget
+    pkg/sby:        *EmptyTarget
     pkg/yices2:     *EmptyTarget
     pkg/z3:         *EmptyTarget
     formal/min: { <<: *FormalDockerfile, target: min }
@@ -178,7 +178,7 @@ jobs:
     cvc:        *SysDebianAmd64
     pono:       *SysDebianBullseyeAmd64
     superprove: *SysDebianBullseyeAmd64
-    symbiyosys: *SysDebianAmd64
+    sby:        *SysDebianAmd64
     yices2:     *SysDebianAmd64
     z3:         *SysDebianAmd64